js移动、拖动图片

1、

<script>var xx=0,yy=0  //拖动图片</script>
<img src="http://www.gz132.com/images/gzlogo.gif" style='position:absolute;' this.style.cursor="hand"'  ondragstart="setCapture();xx=event.x-this.offsetLeft;yy=event.y-this.offsetTop;" ondrag='this.style.left=event.x-xx;this.style.top=event.y-yy' ondragend="releaseCapture();"/>

2、

<span style='position:absolute;width:200;height:200;background:red' onmousedown=MouseDown(this) onmousemove=MouseMove() onmouseup=MouseUp()>meizz</span> 
<script language=javascript> 
var Obj; 
function MouseDown(obj) 
{ 
  Obj=obj; 
  Obj.setCapture(); 
  Obj.l=event.x-Obj.style.pixelLeft; 
  Obj.t=event.y-Obj.style.pixelTop; 
} 
function MouseMove() 
{ 
  if(Obj!=null) 
  { 
    Obj.style.left = event.x-Obj.l; 
    Obj.style.top = event.y-Obj.t; 
  } 
} 
function MouseUp() 
{ 
  if(Obj!=null) 
  { 
    Obj.releaseCapture(); 
    Obj=null; 
  } 
} 
</script> 

3、

<div id="myDiv" src="logo.gif" ondrag="doDrag();" onmouseover="this.style.cursor='hand'" style="position:absolute;left=100;top=100;" onmousedown="doMouseDown();"> 
<a href="#" onclick="return false"><h1>wlecome</h1></a> 
</div> 
<script language="JavaScript" type="text/javascript"> 
var orgMouseX; 
var orgMouseY; 
var orgObjX; 
var orgObjY; 
function doDrag() 
{ 
var myObject=document.all.myDiv; 

var x=event.clientX; 
var y=event.clientY; 
myObject.style.left=x-(orgMouseX-orgObjX); 
myObject.style.top=y-(orgMouseY-orgObjY); 
  
} 
function doMouseDown() 
{ 
orgMouseX=event.clientX; 
orgMouseY=event.clientY; 
orgObjX=parseInt(document.all.myDiv.style.left); 
orgObjY=parseInt(document.all.myDiv.style.top); 
} 

</script>