javascript最短的拖动代码[兼容FF]

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以下为程序代码:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  <html xmlns="http://www.w3.org/1999/xhtml">  <head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" />  <script language="JavaScript" type="text/javascript">  var x,y  var drag_=false  var D=new Function('obj','return document.getElementById(obj);')  var IE=new Function('','if(navigator.appName.indexOf("Explorer")>=0)return 1;if(navigator.appName.indexOf("Netscape")>=0)return 2')  function Move_obj(obj){//1                       D(obj).onmousedown=function(e){drag_=true//4                                with(this){style.position="absolute";temp1=offsetLeft;temp2=offsetTop;//5                                if(IE()==1){x=event.clientX;y=event.clientY//6                                    document.onmousemove=function(e){//7                                          if(drag_==false)return false                                       with(this){style.left=temp1+event.clientX-x+"px";style.top=temp2+event.clientY-y+"px"}                                       }//7                                }//6                                if(IE()==2){x=e.pageX;y=e.pageY;//8                                    document.onmousemove=function(e){//9                                          if(drag_==false)return false                                       with(this){style.left=temp1+e.pageX-x+"px";style.top=temp2+e.pageY-y+"px"}                                       }//9                                }//8                          }//5             document.onmouseup=new Function("drag_=false")                       }//4  }//1  </script>  <body>  <div id="test" style="background-color:#0099CC;width:200px"onmouseover='Move_obj("test")'>这个是可以拖动的层</div>

[Ctrl+A 全选注:引入外部Js需再刷新一下页面才能执行]

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javascript最短的拖动代码[兼容FF]

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