html部分
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script type="text/javascript" src="jquery-1.4.2.min.js"></script>
<script type="text/javascript" src="tuo.js"></script>
<script type="text/javascript">
$(function(){
$("#box").tuoz();
})
</script>
<style type="text/css">
*{
margin:0px;
padding:0px;
}
#box{
height:100px;
width:100px;
background:#666666;
}
#box img{
height:50px;
width:50px;
background:#666666;
}
#big{
height:400px;
width:300px;
background:purple;
}
</style>
</head>
<body>
<div id="box"><img src="http://www.baidu.com/img/baidu_sylogo1.gif"></img></div>
<div id="big"></div>
</body>
</html>
jquery部分
(function(){
$.fn.extend({
tuoz:function(){
return this.each(function(){
var $this=$(this);
var ey="";
var ex="";
var mx="";
var my="";
var tx="";
var ty="";
var small_x="";
var small_y="";
var big_height="";
var big_width="";
var big_x="";
var big_y="";
var move="false";
$this.mousedown(function(e){
move="true";
mx=$this.offset().left;
my=$this.offset().top;
ex=e.clientX;
ey=e.clientY;
tx=ex-mx;
ty=ey-my;
small_x=$("#big").offset().left;
small_y=$("#big").offset().top;
big_height=$("#big").height();
big_width=$("#big").width();
big_x=small_x+big_width;
big_y=small_y+big_height;
})
$(document).mousemove(function(e){
ex=e.clientX;
ey=e.clientY;
if(move=="true"){
$this.offset({left:ex-tx,top:ey-ty});
}
})
$this.mouseup(function(e){
move=false;
ex=e.clientX;
ey=e.clientY;
if(ex>=small_x && ey>=small_y && ex<=big_x && ey<=big_y){
$("#big").append($this.html());
}
$this.offset({left:mx,top:my});
})
})
}
})
})(jQuery)