js可拖动的后台界面

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我是靠谱客的博主兴奋汉堡，最近开发中收集的这篇文章主要介绍js可拖动的后台界面，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

// ************************ 拖动 *********************************
    function setDrag(e){
            var drag_flag = true;
            var begin_x = getX(e);
            //添加蒙板
            createMask();
            //添加半透明拖动条
            createSplitDiv();

    function getX(e){
            if(window.event) e = window.event;
            return (e.x || e.clientX);
    }

    function createSplitDiv(){
        //半透明的拖动条
        var _top = $doc("topArea").offsetHeight +"px";
        var _left = $doc("dragBar").offsetLeft +"px";;
        var _height = $doc("dragBar").offsetHeight +"px";;

        var splitDivCss="position:absolute;width:6px;height:"+_height+";top:"+_top+";left:"+_left+";cursor:col-
resize;background-color:#cccccc;overflow:hidden;z-index:10010;filter:alpha(opacity=50);opacity:0.5;";
        var _splitDiv = document.createElement("div");
        _splitDiv.id = "splitDiv";
        _splitDiv.style.cssText = splitDivCss;

        document.body.appendChild(_splitDiv);

    }
    function createMask(){
            try{

                //创建背景
                var rootEl=document.documentElement||document.body;
                var docHeight=((rootEl.clientHeight>rootEl.scrollHeight)?
rootEl.clientHeight:rootEl.scrollHeight)+"px";
                var docWidth=((rootEl.clientWidth>rootEl.scrollWidth)?rootEl.clientWidth:rootEl.scrollWidth)
+"px";
                var
shieldStyle="position:absolute;top:0px;left:0px;width:"+docWidth+";height:"+docHeight+";background:#cccccc;z-
index:10000;filter:alpha(opacity=0);opacity:0";
                var _shield = document.createElement("div");
                _shield.id = "shield";
                _shield.style.cssText = shieldStyle;
                document.body.appendChild(_shield);
            }catch(e){}
        }
        //拖动时执行的函数
        document.onmousemove = function(e){
            try{
                if(drag_flag){
                        var now_x = getX(e);
                        var _pv = parseInt($doc("splitDiv").style.left)+ now_x - begin_x;
                        $doc("splitDiv").style.left = _pv +"px";
                         begin_x = now_x;
                }else{
                        $doc("leftShow").style.width = $doc("splitDiv").style.left;
                        document.body.removeChild($doc("shield"));
                        document.body.removeChild($doc("splitDiv"));
                        // 调整页面布局
                        resizePage();
                }
            }catch(e){}
        }

        document.onmouseup = function(){
            try{
                if(drag_flag){
                    //设定拖动条的位置（设定左侧的宽度）
                    $doc("leftShow").style.width = $doc("splitDiv").style.left;
                    document.body.removeChild($doc("shield"));
                    document.body.removeChild($doc("splitDiv"));
                    // 调整页面布局
                    resizePage();
                }
                drag_flag = false;
                begin_x = null;
            }catch(e){}
        }

    }

    if(window.attachEvent){
          window.attachEvent("onload",function(){resizePage();});
          window.attachEvent("onresize",function(){resizePage();});
    }
  if(window.addEventListener){
       window.addEventListener("load",function(){resizePage();},true);
       window.addEventListener("resize",function(){resizePage();},true);
  }

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 
<title>可拖动的后台界面_脚本之家_uoften.com</title> 
<style type="text/css"> 
 *{ 
   margin: 0px;  
    font-size:12px; 
    font-family:"宋体"; 
    color:#000000; 
} 
html,body{  
    height: 100%;  
    width: 100%;  
      overflow:hidden; 
      background-color:#EEEEEF; 
}  
img{ 
    padding:0px; 
    margin:0px; 
    vertical-align:middle; 
    border:0px; 
}

.f_left{ 
    float:left; 
    clear:right; 
} 
.f_right{ 
    float:right ; 
    clear:right; 
} 
.topArea{ 
    width:100%; 
    height:60px; 
} 
.logoArea{ 
  float:left; 
  width:100%; 
  height:36px; 
  background-color:#EEEEEF; 
} 
.toolbarArea{ 
  float:left; 
  width:100%; 
  height:24px; 
  background-color:#EEEEEF; 
} 
.bottomArea{ 
    height:25px; 
    line-height:25px; 
  background-color:#EEEEEF ; 
} 
.leftBg{ 
    background:#ffffff; 
    border:1px solid #BEBEBE; 
} 
.mainContent{ 
  padding:0px; 
} 
.content_show{ 
    float:left; 
    clear:right; 
    height:100%; 
    width:auto; 
    margin:0px; 
    padding:0px; 
    background-color:#ffffff; 
    border:1px solid #BEBEBE; 
}

.splitBar{ 
  width:6px; 
  height:100%; 
    cursor:col-resize; 
}     
</style> 
 
</head>

<body>

</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]