兼容IE FF Opera的javascript最短的拖动代码_javascript技巧

<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> <div id="test" style="background-color:#0099CC;width:200px" onmouseover='Move_obj("test")'>杩</div>