DIV 浮动对话框 兼容IE , FF
JS:
function Tong_MoveDiv()
{
//参数说明
// id 要移动的层ID
// Evt 是 event, window.event; 要在FF 中可以用 e ? e :window.event;
// T 为 int 有数字是拖动 没有是变大小
this.Move=function(Id,Evt,T)
{
if(Id=="") return;
var o = document.getElementById(Id);
if(!o) return;//如果这个东东不在
evt = Evt ? Evt : window.event;
o.style.position = "absolute";//设定他的样式为绝对定位
o.style.zIndex = 200;//这里显示上下的
var obj = evt.srcElement ? evt.srcElement : evt.target; //得到个原素 使它在FF中也可以用
//得到当前对要移动对象的 坐标
var w = o.offsetWidth;
var h = o.offsetHeight;
var l = o.offsetLeft;
var t = o.offsetTop;
var div = document.createElement("DIV");//新原素DIV
document.body.appendChild(div);
div.style.cssText = "filter:alpha(Opacity=10,style=0);opacity:0.2;width:"+w+"px;height:"+h+"px;top:"+t+"px;left:"+l+"px;position:absolute;background:#BBBBBB";//设定 filter； 注意opacity 是FF中的 Opacity
div.setAttribute("id", Id +"temp");
if(T)//看看是拖动还是 变大小
{
this.Move_OnlyMove(Id,evt);
}
else
{
}
}
//移动函数
//参数 Id 要移动的层ID
//Evt 是 event, window.event; 要在FF 中可以用 e ? e :window.event;
this.Move_OnlyMove = function(Id,Evt)
{
var o = document.getElementById(Id+"temp");
if(!o) return;
evt = Evt?Evt:window.event;//都是FF 才要这么写的
var relLeft = evt.clientX - o.offsetLeft;//得到左边的 宽度
var relTop = evt.clientY - o.offsetTop;//得到上边的 宽度
//抓取 事件
if (!window.captureEvents)
{
o.setCapture(); //指定 抓取 事件
}
else
{
window.captureEvents(Event.MOUSEMOVE|Event.MOUSEUP);
}
//文档的 onmousemove 事件
document.onmousemove = function(e)
{
if (!o) return;
e = e ? e : window.event;
if (e.clientX - relLeft <= 0)
o.style.left = 0 +"px";
else if (e.clientX - relLeft >= document.documentElement.clientWidth - o.offsetWidth - 2)
o.style.left = (document.documentElement.clientWidth - o.offsetWidth - 2) +"px";
else
o.style.left = e.clientX - relLeft +"px";
if (e.clientY - relTop <= 1)
o.style.top = 1 +"px";
else if (e.clientY - relTop >= document.documentElement.clientHeight - o.offsetHeight - 30)
o.style.top = (document.documentElement.clientHeight - o.offsetHeight - 30) +"px";
else
o.style.top = e.clientY - relTop +"px";
}
//文档的 onmouseup 事件
document.onmouseup = function()
{
if (!o) return;
if (!window.captureEvents)
o.releaseCapture();
else
window.releaseEvents(Event.MOUSEMOVE|Event.MOUSEUP);
var o1 = document.getElementById(Id);
if (!o1) return;
var l0 = o.offsetLeft;
var t0 = o.offsetTop;
var l = o1.offsetLeft;
var t = o1.offsetTop;
MyMove.Move_e(Id, l0 , t0, l, t);
document.body.removeChild(o);
o = null;
}
}
this.Move_e = function(Id, l0 , t0, l, t)
{
if (typeof(window["ct"+ Id]) != "undefined") clearTimeout(window["ct"+ Id]);
var o = document.getElementById(Id);
if (!o) return;
var sl = st = 8;
var s_l = Math.abs(l0 - l);
var s_t = Math.abs(t0 - t);
if (s_l - s_t > 0)
if (s_t)
sl = Math.round(s_l / s_t) > 8 ? 8 : Math.round(s_l / s_t) * 6;
else
sl = 0;
else
if (s_l)
st = Math.round(s_t / s_l) > 8 ? 8 : Math.round(s_t / s_l) * 6;
else
st = 0;
if (l0 - l < 0) sl *= -1;
if (t0 - t < 0) st *= -1;
if (Math.abs(l + sl - l0) < 52 && sl) sl = sl > 0 ? 2 : -2;
if (Math.abs(t + st - t0) < 52 && st) st = st > 0 ? 2 : -2;
if (Math.abs(l + sl - l0) < 16 && sl) sl = sl > 0 ? 1 : -1;
if (Math.abs(t + st - t0) < 16 && st) st = st > 0 ? 1 : -1;
if (s_l == 0 && s_t == 0) return;
if (Math.abs(l + sl - l0) < 2)
o.style.left = l0 +"px";
else
o.style.left = l + sl +"px";
if (Math.abs(t + st - t0) < 2)
o.style.top = t0 +"px";
else
o.style.top = t + st +"px";
window["ct"+ Id] = window.setTimeout("MyMove.Move_e('"+ Id +"', "+ l0 +" , "+ t0 +", "+ (l + sl) +", "+ (t + st) +")", 1);
}
}
var MyMove = new Tong_MoveDiv();
后台：
<div id="divmove" style="border:1px dashed #5E5E5E; width:400px; text-align:center;">
<div onmousedown="MyMove.Move('divmove',event,1)" style="cursor:move; height:20px; background-color:#FFF"></div>
<textarea id="TextArea1" rows="10" cols="45"></textarea>
<input id="Submit1" type="submit" value="回复" />
<input id="Reset1" type="reset" value="清空" />
</div>
转自http://www.cnblogs.com/Csharp-net/archive/2007/12/15/996046.html
