模仿网易彩票网（http://caipiao.163.com/）的登陆框自己做了一个拖动层，不过有点小问题——在谷歌浏览拖动的时候鼠标状态变成了文字状态（cursor:text;)
1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2 <html xmlns="http://www.w3.org/1999/xhtml">
3 <head>
4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
5 <title>js拖动层</title>
6 <style>
7 body{padding:0; margin:0; width:100%; height:100%;}
8 * html,* html body{background-image:url(about:blank);background-attachment:fixed}
9 #dragWp{width:100%; height:100%; position:fixed; left:0; top:0; z-index:99999999; _position:absolute;_left:expression(eval(document.documentElement.scrollLeft));_top:expression(eval(document.documentElement.scrollTop))}
10 #dragBg{ width:100%; height:100%; background-color:#000; position:absolute; left:0; top:0; opacity:0.4; filter:alpha(opacity=40);}
11 #dragMain{width:200px;height:100px;position:absolute; border:1px solid #999;line-height:30px;font-size:16px;text-align:center; background-color:#FFF;}
12 #dragTitle{ width:100%; height:40px; line-height:40px; background-color:#ccc; cursor:move;}
13 #close{float:right; margin-right:5px; z-index:999; font-size:12px; font-style:normal; cursor:pointer;}
14 </style>
15 </head>
16 <body>
17 <div style="height:1200px; text-align:center;">
18 <h1>hello world</h1>
19 </div>
20 <div id="dragWp">
21 <div id="dragBg"></div>
22 <div id="dragMain">
23 <div id="dragTitle">
24 <em id="close">关闭</em>拖动层
25 </div>
26 hello world
27 </div>
28 </div>
29 <script>
30 window.onload=function(){
31 var dragWp=document.getElementById("dragWp");
32 var dragMainId=document.getElementById("dragMain");
33 var w=dragWp.offsetWidth;
34 var h=dragWp.offsetHeight;
35 dragMainId.style.left=(w-dragMainId.offsetWidth)/2+"px";
36 dragMainId.style.top=(h-dragMainId.offsetHeight)/2+"px";
37 }
38
39 function dragTemp(dragWp,dragMainId,dragTitleId,closeId,opacity){
40 var dragWp=document.getElementById(dragWp);
41 var dragMainId=document.getElementById(dragMainId);
42 var dragTitleId=document.getElementById(dragTitleId);
43 var closeId=document.getElementById(closeId);
44 var posX,posY,x,y;
45 dragTitleId.onmousedown=function(e){
46 var e = e || window.event;
47 posX=e.clientX-dragMainId.offsetLeft; //鼠标距离拖动层左侧的距离
48 posY=e.clientY-dragMainId.offsetTop; //鼠标距离拖动层上侧的距离
49 dragMainId.style.opacity=opacity;
50 dragMainId.style.filter="alpha(opacity="+opacity*100+")";
51 document.onmousemove=function(e){
52 var e = e || window.event;
53 x=e.clientX-posX;
54 y=e.clientY-posY;
55 // if(x<=0) x=0; //不允许移出左边
56 // else if(x>=document.body.clientWidth-dragMainId.offsetWidth) x=document.body.clientWidth-dragMainId.offsetWidth; //不允许移出右边
57 dragMainId.style.left=x+"px";
58 dragMainId.style.top=y+"px";
59 dragTitleId.style.cursor="move";
60 document.onselectstart=function(){ return false } //拖动不选中文字
61 }
62 };
63 document.onmouseup=function(){
64 document.onmousemove=null;
65 dragMainId.style.opacity=1;
66 dragMainId.style.filter="alpha(opacity=100)";
67 }
68 if(closeId){
69 closeId.onclick=function(){
70 dragWp.style.display="none";
71 }
72 }
73 }
74 function drag(args){
75 dragTemp(args.dragWp,
76 args.dragMainId,
77 args.dragTitleId,
78 args.closeId || null,
79 args.opacity || 1)
80 }
81 //调用
82 drag({dragWp:"dragWp",dragMainId:"dragMain",dragTitleId:"dragTitle",closeId:"close",opacity:0.5});
83 </script>
84 </body>
85 </html>
时间： 2024-11-05 15:57:29