1: <html>
2: <title>
3:
4: </title>
5: <body>
6: <style type="text/css">
7: #block{
8: background-color:green;
9: font-size:9pt;
10: padding:30px;
11: color:white;
12: 100px;
13: height:120px;
14: position:absolute;
15: }
16: </style>
17: <div id="block"></div>
18:
19: <script>
20: function down(event){
21:
22: var x = event.clientX;
23: var y = event.clientY;
24: var oleft = document.getElementById('block').offsetLeft;
25: var otop = document.getElementById('block').offsetTop;
26: offx = x - oleft;
27: offy = y - otop;
28:
29: document.onmousemove = move;
30: document.onmousemup = up;
31:
32: }
33: function move(event){
34: var x = event.clientX;
35: var y = event.clientY;
36:
37: document.getElementById('block').style.left = x - offx +'px';
38: document.getElementById('block').style.top = y - offy +'px';
39:
40: document.onmouseup = up;
41: }
42: function up(){
43: document.onmouseup = null;
44: document.onmousemove = null;
45: }
46: window.onload = function(){
47: document.onmousedown = down;
48: }
49: </script>
50:
51:
52: </body>
53:
54:
55: </html>