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    學(xué)習(xí)啦 > 學(xué)習(xí)電腦 > 電腦硬件知識(shí) > 鍵盤鼠標(biāo) > jst實(shí)現(xiàn)鼠標(biāo)拖動(dòng)選擇功能

    jst實(shí)現(xiàn)鼠標(biāo)拖動(dòng)選擇功能

    時(shí)間: 沈迪豪908 分享

    jst實(shí)現(xiàn)鼠標(biāo)拖動(dòng)選擇功能

      學(xué)習(xí)前端的同學(xué)你們知道怎么用JavaScript簡(jiǎn)單實(shí)現(xiàn)鼠標(biāo)拖動(dòng)選擇功能嗎?不知道的話跟著學(xué)習(xí)啦小編一起來(lái)學(xué)習(xí)用JavaScript簡(jiǎn)單實(shí)現(xiàn)鼠標(biāo)拖動(dòng)選擇功能。

      JavaScript簡(jiǎn)單實(shí)現(xiàn)鼠標(biāo)拖動(dòng)選擇功能的具體方法

      代碼如下:

      <style><!--

      body{padding-top:50px;padding-left:100px;padding-right:150px;}

      .fileDiv{float:left;width:100px;height:100px;text-align:center;line-height:100px;font-size:12px;border:1px solid #cccccc;margin-right:10px;margin-bottom:10px;}

      .seled{border:1px solid #ff0000;background-color:#D6DFF7;}

      --></style>

      <script type="text/javascript">// <![CDATA[

      Array.prototype.remove = function( item ){

      for( var i = 0 ; i < this.length ; i++ ){

      if( item == this[i] )

      break;

      }

      if( i == this.length )

      return;

      for( var j = i ; j < this.length - 1 ; j++ ){

      this[ j ] = this[ j + 1 ];

      }

      this.length--;

      }

      String.prototype.replaceAll = function (AFindText,ARepText){ raRegExp = new RegExp(AFindText,"g"); return this.replace(raRegExp,ARepText);}

      function getAllChildren(e) {

      return e.all ? e.all : e.getElementsByTagName('*');

      }

      document.getElementsBySelector = function(selector) {

      if (!document.getElementsByTagName) {

      return new Array();

      }

      var tokens = selector.split(' ');

      var currentContext = new Array(document);

      for (var i = 0; i < tokens.length; i++) {

      token = tokens[i].replace(/^s+/,'').replace(/s+$/,'');;

      if (token.indexOf('#') > -1) {

      var bits = token.split('#');

      var tagName = bits[0];

      var id = bits[1];

      var element = document.getElementById(id);

      if (tagName && element.nodeName.toLowerCase() != tagName) {

      return new Array();

      }

      currentContext = new Array(element);

      continue;

      }

      if (token.indexOf('.') > -1) {

      var bits = token.split('.');

      var tagName = bits[0];

      var className = bits[1];

      if (!tagName) {

      tagName = '*';

      }

      var found = new Array;

      var foundCount = 0;

      for (var h = 0; h < currentContext.length; h++) {

      var elements;

      if (tagName == '*') {

      elements = getAllChildren(currentContext[h]);

      } else {

      elements = currentContext[h].getElementsByTagName(tagName);

      }

      for (var j = 0; j < elements.length; j++) {

      found[foundCount++] = elements[j];

      }

      }

      currentContext = new Array;

      var currentContextIndex = 0;

      for (var k = 0; k < found.length; k++) {

      if (found[k].className && found[k].className.match(new RegExp('b'+className+'b'))) {

      currentContext[currentContextIndex++] = found[k];

      }

      }

      continue;

      }

      if (token.match(/^(w*)[(w+)([=~|^$*]?)=?"?([^]"]*)"?]$/)) {

      var tagName = RegExp. class="main">

    學(xué)習(xí)啦 > 學(xué)習(xí)電腦 > 電腦硬件知識(shí) > 鍵盤鼠標(biāo) > jst實(shí)現(xiàn)鼠標(biāo)拖動(dòng)選擇功能

    jst實(shí)現(xiàn)鼠標(biāo)拖動(dòng)選擇功能

    時(shí)間: 沈迪豪908 分享

      var attrName = RegExp.

    jst實(shí)現(xiàn)鼠標(biāo)拖動(dòng)選擇功能

      學(xué)習(xí)前端的同學(xué)你們知道怎么用JavaScript簡(jiǎn)單實(shí)現(xiàn)鼠標(biāo)拖動(dòng)選擇功能嗎?不知道的話跟著學(xué)習(xí)啦小編一起來(lái)學(xué)習(xí)用JavaScript簡(jiǎn)單實(shí)現(xiàn)鼠標(biāo)拖動(dòng)選擇功能。

      JavaScript簡(jiǎn)單實(shí)現(xiàn)鼠標(biāo)拖動(dòng)選擇功能的具體方法

      代碼如下:

      <style><!--

      body{padding-top:50px;padding-left:100px;padding-right:150px;}

      .fileDiv{float:left;width:100px;height:100px;text-align:center;line-height:100px;font-size:12px;border:1px solid #cccccc;margin-right:10px;margin-bottom:10px;}

      .seled{border:1px solid #ff0000;background-color:#D6DFF7;}

      --></style>

      <script type="text/javascript">// <![CDATA[

      Array.prototype.remove = function( item ){

      for( var i = 0 ; i < this.length ; i++ ){

      if( item == this[i] )

      break;

      }

      if( i == this.length )

      return;

      for( var j = i ; j < this.length - 1 ; j++ ){

      this[ j ] = this[ j + 1 ];

      }

      this.length--;

      }

      String.prototype.replaceAll = function (AFindText,ARepText){ raRegExp = new RegExp(AFindText,"g"); return this.replace(raRegExp,ARepText);}

      function getAllChildren(e) {

      return e.all ? e.all : e.getElementsByTagName('*');

      }

      document.getElementsBySelector = function(selector) {

      if (!document.getElementsByTagName) {

      return new Array();

      }

      var tokens = selector.split(' ');

      var currentContext = new Array(document);

      for (var i = 0; i < tokens.length; i++) {

      token = tokens[i].replace(/^s+/,'').replace(/s+$/,'');;

      if (token.indexOf('#') > -1) {

      var bits = token.split('#');

      var tagName = bits[0];

      var id = bits[1];

      var element = document.getElementById(id);

      if (tagName && element.nodeName.toLowerCase() != tagName) {

      return new Array();

      }

      currentContext = new Array(element);

      continue;

      }

      if (token.indexOf('.') > -1) {

      var bits = token.split('.');

      var tagName = bits[0];

      var className = bits[1];

      if (!tagName) {

      tagName = '*';

      }

      var found = new Array;

      var foundCount = 0;

      for (var h = 0; h < currentContext.length; h++) {

      var elements;

      if (tagName == '*') {

      elements = getAllChildren(currentContext[h]);

      } else {

      elements = currentContext[h].getElementsByTagName(tagName);

      }

      for (var j = 0; j < elements.length; j++) {

      found[foundCount++] = elements[j];

      }

      }

      currentContext = new Array;

      var currentContextIndex = 0;

      for (var k = 0; k < found.length; k++) {

      if (found[k].className && found[k].className.match(new RegExp('b'+className+'b'))) {

      currentContext[currentContextIndex++] = found[k];

      }

      }

      continue;

      }

      if (token.match(/^(w*)[(w+)([=~|^$*]?)=?"?([^]"]*)"?]$/)) {

      var tagName = RegExp.$1;

      var attrName = RegExp.$2;

      var attrOperator = RegExp.$3;

      var attrValue = RegExp.$4;

      if (!tagName) {

      tagName = '*';

      }

      var found = new Array;

      var foundCount = 0;

      for (var h = 0; h < currentContext.length; h++) {

      var elements;

      if (tagName == '*') {

      elements = getAllChildren(currentContext[h]);

      } else {

      elements = currentContext[h].getElementsByTagName(tagName);

      }

      for (var j = 0; j < elements.length; j++) {

      found[foundCount++] = elements[j];

      }

      }

      currentContext = new Array;

      var currentContextIndex = 0;

      var checkFunction;

      switch (attrOperator) {

      case '=':

      checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); };

      break;

      case '~':

      checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('b'+attrValue+'b'))); };

      break;

      case '|':

      checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); };

      break;

      case '^':

      checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); };

      break;

      case '$':

      checkFunction = function(e) { return (e.getAttribute(attrName).lastIndexOf(attrValue) == e.getAttribute(attrName).length - attrValue.length); };

      break;

      case '*':

      checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) > -1); };

      break;

      default :

      checkFunction = function(e) { return e.getAttribute(attrName); };

      }

      currentContext = new Array;

      var currentContextIndex = 0;

      for (var k = 0; k < found.length; k++) {

      if (checkFunction(found[k])) {

      currentContext[currentContextIndex++] = found[k];

      }

      }

      continue;

      }

      tagName = token;

      var found = new Array;

      var foundCount = 0;

      for (var h = 0; h < currentContext.length; h++) {

      var elements = currentContext[h].getElementsByTagName(tagName);

      for (var j = 0; j < elements.length; j++) {

      found[foundCount++] = elements[j];

      }

      }

      currentContext = found;

      }

      return currentContext;

      }

      function addEvent(eventType,eventFunc,eventObj){

      eventObj = eventObj || document;

      if(window.attachEvent) eventObj.attachEvent("on"+eventType,eventFunc);

      if(window.addEventListener) eventObj.addEventListener(eventType,eventFunc,false);

      }

      function clearEventBubble(evt){

      evt = evt || window.event;

      if (evt.stopPropagation) evt.stopPropagation(); else evt.cancelBubble = true;

      if (evt.preventDefault) evt.preventDefault(); else evt.returnValue = false;

      }

      function posXY(event){

      event = event || window.event;

      var posX = event.pageX || (event.clientX +

      (document.documentElement.scrollLeft || document.body.scrollLeft));

      var posY = event.pageY || (event.clientY +

      (document.documentElement.scrollTop || document.body.scrollTop));

      return {x:posX, y:posY};

      }

      var _selectedRegions = [];

      function RegionSelect(selRegionProp){

      this.regions =[];

      var _regions = document.getElementsBySelector(selRegionProp["region"]);

      if(_regions && _regions.length > 0){

      var _self = this;

      for(var i=0; i< _regions.length;i++){

      _regions[i].onmousedown = function(){

      var evt = window.event || arguments[0];

      if(!evt.shiftKey && !evt.ctrlKey){

      // 清空所有select樣式

      _self.clearSelections(_regions);

      this.className += " "+_self.selectedClass;

      // 清空selected數(shù)組,并加入當(dāng)前select中的元素

      _selectedRegions = [];

      _selectedRegions.push(this);

      }else{

      if(this.className.indexOf(_self.selectedClass) == -1){

      this.className += " "+_self.selectedClass;

      _selectedRegions.push(this);

      }else{

      this.className = this.className.replaceAll(_self.selectedClass,"");

      _selectedRegions.remove(this);

      }

      }

      clearEventBubble(evt);

      }

      this.regions.push(_regions[i]);

      }

      }

      this.selectedClass = selRegionProp["selectedClass"];

      this.selectedRegion = [];

      this.selectDiv = null;

      this.startX = null;

      this.startY = null;

      }

      RegionSelect.prototype.select = function(){

      var _self = this;

      addEvent("mousedown",function(){

      var evt = window.event || arguments[0];

      _self.onBeforeSelect(evt);

      clearEventBubble(evt);

      },document);

      addEvent("mousemove",function(){

      var evt = window.event || arguments[0];

      _self.onSelect(evt);

      clearEventBubble(evt);

      },document);

      addEvent("mouseup",function(){

      _self.onEnd();

      },document);

      }

      RegionSelect.prototype.onBeforeSelect = function(evt){

      if(!document.getElementById("selContainer")){

      this.selectDiv = document.createElement("div");

      this.selectDiv.style.cssText = "position:absolute;width:0px;height:0px;font-size:0px;margin:0px;padding:0px;border:1px dashed #0099FF;background-color:#C3D5ED;z-index:1000;filter:alpha(opacity:60);opacity:0.6;display:none;";

      this.selectDiv.id = "selContainer";

      document.body.appendChild(this.selectDiv);

      }else{

      this.selectDiv = document.getElementById("selContainer");

      }

      this.startX = posXY(evt).x;

      this.startY = posXY(evt).y;

      this.isSelect = true;

      }

      RegionSelect.prototype.onSelect = function(evt){

      var _self = this;

      if(_self.isSelect){

      if(_self.selectDiv.style.display == "none") _self.selectDiv.style.display = "";

      var posX = posXY(evt).x;

      var poxY = posXY(evt).y;

      _self.selectDiv.style.left = Math.min(posX, this.startX);

      _self.selectDiv.style.top = Math.min(poxY, this.startY);

      _self.selectDiv.style.width = Math.abs(posX - this.startX);

      _self.selectDiv.style.height = Math.abs(poxY - this.startY);

      var regionList = _self.regions;

      for(var i=0; i< regionList.length; i++){

      var r = regionList[i], sr = _self.innerRegion(_self.selectDiv,r);

      if(sr && r.className.indexOf(_self.selectedClass) == -1){

      r.className = r.className + " "+_self.selectedClass;

      _selectedRegions.push(r);

      }else if(!sr && r.className.indexOf(_self.selectedClass) != -1){

      r.className = r.className.replaceAll(_self.selectedClass,"");

      _selectedRegions.remove(r);

      }

      }

      }

      }

      RegionSelect.prototype.onEnd = function(){

      if(this.selectDiv){

      this.selectDiv.style.display = "none";

      }

      this.isSelect = false;

      //_selectedRegions = this.selectedRegion;

      }

      // 判斷一個(gè)區(qū)域是否在選擇區(qū)內(nèi)

      RegionSelect.prototype.innerRegion = function(selDiv, region){

      var s_top = parseInt(selDiv.style.top);

      var s_left = parseInt(selDiv.style.left);

      var s_right = s_left + parseInt(selDiv.offsetWidth);

      var s_bottom = s_top + parseInt(selDiv.offsetHeight);

      var r_top = parseInt(region.offsetTop);

      var r_left = parseInt(region.offsetLeft);

      var r_right = r_left + parseInt(region.offsetWidth);

      var r_bottom = r_top + parseInt(region.offsetHeight);

      var t = Math.max(s_top, r_top);

      var r = Math.min(s_right, r_right);

      var b = Math.min(s_bottom, r_bottom);

      var l = Math.max(s_left, r_left);

      if (b > t+5 && r > l+5) {

      return region;

      } else {

      return null;

      }

      }

      RegionSelect.prototype.clearSelections = function(regions){

      for(var i=0; i<regions.length;i++){

      regions[i].className = regions[i].className.replaceAll(this.selectedClass,"");

      }

      }

      function getSelectedRegions(){

      return _selectedRegions;

      }

      function showSelDiv(){

      var selInfo = "";

      var arr = getSelectedRegions();

      for(var i=0; i<arr.length;i++){

      selInfo += arr[i].innerHTML+"n";

      }

      alert("共選擇 "+arr.length+" 個(gè)文件,分別是:n"+selInfo);

      }

      // ]]></script>

      <p><button onclick="showSelDiv();">getRegions</button></p>

      <div class="fileDiv">file1</div>

      <div class="fileDiv">file2</div>

      <div class="fileDiv">file3</div>

      <div class="fileDiv">file4</div>

      <div class="fileDiv">file5</div>

      <div class="fileDiv">file6</div>

      <div class="fileDiv">file7</div>

      <div class="fileDiv">file8</div>

      <div style="float: left; width: 100%;"><button onclick="showSelDiv();">getRegions</button></div>

      <script type="text/javascript">// <![CDATA[

      new RegionSelect({

      region:'div.fileDiv',

      selectedClass: 'seled'

      }).select();

      // ]]></script>

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    ;

      var attrOperator = RegExp.;

      var attrValue = RegExp.;

      if (!tagName) {

      tagName = '*';

      }

      var found = new Array;

      var foundCount = 0;

      for (var h = 0; h < currentContext.length; h++) {

      var elements;

      if (tagName == '*') {

      elements = getAllChildren(currentContext[h]);

      } else {

      elements = currentContext[h].getElementsByTagName(tagName);

      }

      for (var j = 0; j < elements.length; j++) {

      found[foundCount++] = elements[j];

      }

      }

      currentContext = new Array;

      var currentContextIndex = 0;

      var checkFunction;

      switch (attrOperator) {

      case '=':

      checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); };

      break;

      case '~':

      checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('b'+attrValue+'b'))); };

      break;

      case '|':

      checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); };

      break;

      case '^':

      checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); };

      break;

      case '$':

      checkFunction = function(e) { return (e.getAttribute(attrName).lastIndexOf(attrValue) == e.getAttribute(attrName).length - attrValue.length); };

      break;

      case '*':

      checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) > -1); };

      break;

      default :

      checkFunction = function(e) { return e.getAttribute(attrName); };

      }

      currentContext = new Array;

      var currentContextIndex = 0;

      for (var k = 0; k < found.length; k++) {

      if (checkFunction(found[k])) {

      currentContext[currentContextIndex++] = found[k];

      }

      }

      continue;

      }

      tagName = token;

      var found = new Array;

      var foundCount = 0;

      for (var h = 0; h < currentContext.length; h++) {

      var elements = currentContext[h].getElementsByTagName(tagName);

      for (var j = 0; j < elements.length; j++) {

      found[foundCount++] = elements[j];

      }

      }

      currentContext = found;

      }

      return currentContext;

      }

      function addEvent(eventType,eventFunc,eventObj){

      eventObj = eventObj || document;

      if(window.attachEvent) eventObj.attachEvent("on"+eventType,eventFunc);

      if(window.addEventListener) eventObj.addEventListener(eventType,eventFunc,false);

      }

      function clearEventBubble(evt){

      evt = evt || window.event;

      if (evt.stopPropagation) evt.stopPropagation(); else evt.cancelBubble = true;

      if (evt.preventDefault) evt.preventDefault(); else evt.returnValue = false;

      }

      function posXY(event){

      event = event || window.event;

      var posX = event.pageX || (event.clientX +

      (document.documentElement.scrollLeft || document.body.scrollLeft));

      var posY = event.pageY || (event.clientY +

      (document.documentElement.scrollTop || document.body.scrollTop));

      return {x:posX, y:posY};

      }

      var _selectedRegions = [];

      function RegionSelect(selRegionProp){

      this.regions =[];

      var _regions = document.getElementsBySelector(selRegionProp["region"]);

      if(_regions && _regions.length > 0){

      var _self = this;

      for(var i=0; i< _regions.length;i++){

      _regions[i].onmousedown = function(){

      var evt = window.event || arguments[0];

      if(!evt.shiftKey && !evt.ctrlKey){

      // 清空所有select樣式

      _self.clearSelections(_regions);

      this.className += " "+_self.selectedClass;

      // 清空selected數(shù)組,并加入當(dāng)前select中的元素

      _selectedRegions = [];

      _selectedRegions.push(this);

      }else{

      if(this.className.indexOf(_self.selectedClass) == -1){

      this.className += " "+_self.selectedClass;

      _selectedRegions.push(this);

      }else{

      this.className = this.className.replaceAll(_self.selectedClass,"");

      _selectedRegions.remove(this);

      }

      }

      clearEventBubble(evt);

      }

      this.regions.push(_regions[i]);

      }

      }

      this.selectedClass = selRegionProp["selectedClass"];

      this.selectedRegion = [];

      this.selectDiv = null;

      this.startX = null;

      this.startY = null;

      }

      RegionSelect.prototype.select = function(){

      var _self = this;

      addEvent("mousedown",function(){

      var evt = window.event || arguments[0];

      _self.onBeforeSelect(evt);

      clearEventBubble(evt);

      },document);

      addEvent("mousemove",function(){

      var evt = window.event || arguments[0];

      _self.onSelect(evt);

      clearEventBubble(evt);

      },document);

      addEvent("mouseup",function(){

      _self.onEnd();

      },document);

      }

      RegionSelect.prototype.onBeforeSelect = function(evt){

      if(!document.getElementById("selContainer")){

      this.selectDiv = document.createElement("div");

      this.selectDiv.style.cssText = "position:absolute;width:0px;height:0px;font-size:0px;margin:0px;padding:0px;border:1px dashed #0099FF;background-color:#C3D5ED;z-index:1000;filter:alpha(opacity:60);opacity:0.6;display:none;";

      this.selectDiv.id = "selContainer";

      document.body.appendChild(this.selectDiv);

      }else{

      this.selectDiv = document.getElementById("selContainer");

      }

      this.startX = posXY(evt).x;

      this.startY = posXY(evt).y;

      this.isSelect = true;

      }

      RegionSelect.prototype.onSelect = function(evt){

      var _self = this;

      if(_self.isSelect){

      if(_self.selectDiv.style.display == "none") _self.selectDiv.style.display = "";

      var posX = posXY(evt).x;

      var poxY = posXY(evt).y;

      _self.selectDiv.style.left = Math.min(posX, this.startX);

      _self.selectDiv.style.top = Math.min(poxY, this.startY);

      _self.selectDiv.style.width = Math.abs(posX - this.startX);

      _self.selectDiv.style.height = Math.abs(poxY - this.startY);

      var regionList = _self.regions;

      for(var i=0; i< regionList.length; i++){

      var r = regionList[i], sr = _self.innerRegion(_self.selectDiv,r);

      if(sr && r.className.indexOf(_self.selectedClass) == -1){

      r.className = r.className + " "+_self.selectedClass;

      _selectedRegions.push(r);

      }else if(!sr && r.className.indexOf(_self.selectedClass) != -1){

      r.className = r.className.replaceAll(_self.selectedClass,"");

      _selectedRegions.remove(r);

      }

      }

      }

      }

      RegionSelect.prototype.onEnd = function(){

      if(this.selectDiv){

      this.selectDiv.style.display = "none";

      }

      this.isSelect = false;

      //_selectedRegions = this.selectedRegion;

      }

      // 判斷一個(gè)區(qū)域是否在選擇區(qū)內(nèi)

      RegionSelect.prototype.innerRegion = function(selDiv, region){

      var s_top = parseInt(selDiv.style.top);

      var s_left = parseInt(selDiv.style.left);

      var s_right = s_left + parseInt(selDiv.offsetWidth);

      var s_bottom = s_top + parseInt(selDiv.offsetHeight);

      var r_top = parseInt(region.offsetTop);

      var r_left = parseInt(region.offsetLeft);

      var r_right = r_left + parseInt(region.offsetWidth);

      var r_bottom = r_top + parseInt(region.offsetHeight);

      var t = Math.max(s_top, r_top);

      var r = Math.min(s_right, r_right);

      var b = Math.min(s_bottom, r_bottom);

      var l = Math.max(s_left, r_left);

      if (b > t+5 && r > l+5) {

      return region;

      } else {

      return null;

      }

      }

      RegionSelect.prototype.clearSelections = function(regions){

      for(var i=0; i<regions.length;i++){

      regions[i].className = regions[i].className.replaceAll(this.selectedClass,"");

      }

      }

      function getSelectedRegions(){

      return _selectedRegions;

      }

      function showSelDiv(){

      var selInfo = "";

      var arr = getSelectedRegions();

      for(var i=0; i<arr.length;i++){

      selInfo += arr[i].innerHTML+"n";

      }

      alert("共選擇 "+arr.length+" 個(gè)文件,分別是:n"+selInfo);

      }

      // ]]></script>

      <p><button onclick="showSelDiv();">getRegions</button></p>

      <div class="fileDiv">file1</div>

      <div class="fileDiv">file2</div>

      <div class="fileDiv">file3</div>

      <div class="fileDiv">file4</div>

      <div class="fileDiv">file5</div>

      <div class="fileDiv">file6</div>

      <div class="fileDiv">file7</div>

      <div class="fileDiv">file8</div>

      <div style="float: left; width: 100%;"><button onclick="showSelDiv();">getRegions</button></div>

      <script type="text/javascript">// <![CDATA[

      new RegionSelect({

      region:'div.fileDiv',

      selectedClass: 'seled'

      }).select();

      // ]]></script>

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