JavaScript中简单实现鼠标拖动选择功能

发布时间：2023-10-24 15:16:33 所属栏目：教程来源：

导读：代码如下:

<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;borde

代码如下:

<style></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);

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