JS+CSS打造可拖动的聊天窗口层

一个可以拖动的聊天窗口层，兼容IE和FF：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<!--

body {

text-align:left;

margin:0;

font:normal 12px Verdana, Arial;

background:#FFEEFF

}

form {

margin:0;

font:normal 12px Verdana, Arial;

}

table,input {

font:normal 12px Verdana, Arial;

}

a:link,a:visited{

text-decoration:none;

color:#333333;

}

a:hover{

text-decoration:none;

color:#FF6600

}

#main {

width:400px;

position:absolute;

left:600px;

top:100px;

background:#EFEFFF;

text-align:left;

filter:Alpha(opacity=90)

}

#ChatHead {

text-align:right;

padding:3px;

border:1px solid #003399;

background:#DCDCFF;

font-size:11px;

color:#3366FF;

cursor:move;

}

#ChatHead a:link,#ChatHead a:visited, {

font-size:14px;

font-weight:bold;

padding:0 3px

}

#ChatBody {

border:1px solid #003399;

border-top:none;

padding:2px;

}

#ChatContent {

height:200px;

padding:6px;

overflow-y:scroll;

word-break: break-all

}

#ChatBtn {

border-top:1px solid #003399;

padding:2px

}

-->

</style>

<!--

function $(d){return document.getElementById(d);}

function gs(d){var t=$(d);if (t){return t.style;}else{return null;}}

function gs2(d,a){

if (d.currentStyle){

var curVal=d.currentStyle[a]

}else{

var curVal=document.defaultView.getComputedStyle(d, null)[a]

}

return curVal;

}

function ChatHidden(){gs("ChatBody").display = "none";}

function ChatShow(){gs("ChatBody").display = "";}

function ChatClose(){gs("main").display = "none";}

function ChatSend(obj){

var o = obj.ChatValue;

if (o.value.length>0){

$("ChatContent").innerHTML += "<strong>Akon说：</strong>"+o.value+"<br/>";

o.value='';

}

if  (document.getElementById){

(

function(){

if (window.opera){ document.write("<input type='hidden' id='Q' value=' '>"); }

var n = 500;

var dragok = false;

var y,x,d,dy,dx;

function move(e)

{

if (!e) e = window.event;

if (dragok){

d.style.left = dx + e.clientX - x + "px";

d.style.top  = dy + e.clientY - y + "px";

return false;

}

function down(e){

if (!e) e = window.event;

var temp = (typeof e.target != "undefined")?e.target:e.srcElement;

if (temp.tagName != "HTML"|"BODY" && temp.className != "dragclass"){

temp = (typeof temp.parentNode != "undefined")?temp.parentNode:temp.parentElement;

}

if('TR'==temp.tagName){

temp = (typeof temp.parentNode != "undefined")?temp.parentNode:temp.parentElement;

}

if (temp.className == "dragclass"){

if (window.opera){ document.getElementById("Q").focus(); }

dragok = true;

temp.style.zIndex = n++;

d = temp;

dx = parseInt(gs2(temp,"left"))|0;

dy = parseInt(gs2(temp,"top"))|0;

x = e.clientX;

y = e.clientY;

document.onmousemove = move;

return false;

}

function up(){

dragok = false;

document.onmousemove = null;

}

document.onmousedown = down;

document.onmouseup = up;

}

)();

}

-->

</script>

</head>

<body>

</div>

</form>

</div>

</body>

</html>