使用div仿javascript模态窗口

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虽然和本blog的内容无关，但是还是写出来吧，希望对大家有帮助
前几天在博客园看到有人说模态窗口在ie7里面显示出现地址栏，其实这本是一件好事，而且ie的模态窗口是ie的函数，ff、opera等都不支持，我评论的原话

只是ie7增强的安全特性罢了，这个世界还真奇怪，有人说ie的安全性不强，天天骂微软，还支持ff说什么用了ff就不会被强奸，微软增强了安全性，又有人说这样增加的安全性不好，真是难伺候
你要用模态窗口ff是根本就打不开，因为那个是ie特有的函数，ff是没有的，另外楼上说的很对加到trusted就行了，另外再说句话你别生气，就是你水平不行，要想得到最大的兼容性就用div，而且div是最漂亮的，就是写得麻烦点

既然说了别人水平不行，那就自己做一个吧，也证明我这段话不是白说，这几天正在做自己用的cms，正好用这个替代alert和模态窗口，这个div是可以移动、嵌套的

做下说明：
代码参考新浪的新闻评论，新浪混淆了代码，其实破解很简单（应该说根本不算破解，不知道怎么说了，就叫破解吧）

写得很简单，没做过多的处理，这是有这么个意思，如果要用到的话还是需要进行修改的

测试ie7通过ff有问题（js报错），新浪的代码ff js没报错，但是div的移动有问题，我没有系统的学过js所以新浪的代码看的不是很懂，理论上ff也是可以做到的，有兴趣完善的和我联系吧，我就想作出一个简单的类，做到ie7和ff能够兼容，这东西至少在微软的ajax普及之前还是能起到不少的作用的

源文件：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">
<html xmlns="">
<head>
<style type="text/css">
#id1{width:100%;height:100%;background-color:#000;position:absolute;top:0;left:0;z-index:49;display:none;}
#id2{top:200px;position:absolute;z-index:50;display:none;border:3px solid #E5E5E5; left:100px;background-color:white;}
</style>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>asfsdfasdfasdf</title>
<script language="javascript" type="text/javascript">
function show(){
id1.style.height=window.screen.height+"px";
id1.style.width=window.screen.width+"px";
id1.style.display='block';
id2.style.display='block'
}
function hide(){
id1.style.display='none'
id2.style.display='none'
}
self.onError=null;
currentX = currentY = 0;
whichIt = null;
lastScrollX = 0; lastScrollY = 0;
NS = (document.layers) ? 1 : 0;
IE = (document.all) ? 1: 0;

function heartBeat() {
if(IE) { diffY = document.body.scrollTop; diffX = document.body.scrollLeft; }                             if(NS) { diffY = self.pageYOffset; diffX = self.pageXOffset; }
if(diffY != lastScrollY) {
percent = .1 * (diffY - lastScrollY);
if(percent > 0) percent = Math.ceil(percent);
else percent = Math.floor(percent);
if(IE) document.all.id2.style.pixelTop += percent;
if(NS) document.id2.top += percent;
lastScrollY = lastScrollY + percent;
}
if(diffX != lastScrollX) {
percent = .1 * (diffX - lastScrollX);
if(percent > 0) percent = Math.ceil(percent);
else percent = Math.floor(percent);
if(IE) document.all.id2.style.pixelLeft += percent;
if(NS) document.id2.left += percent;
lastScrollX = lastScrollX + percent;
}
}


function checkFocus(x,y) {
stalkerx = document.id2.pageX;
stalkery = document.id2.pageY;
stalkerwidth = document.id2.clip.width;
stalkerheight = document.id2.clip.height;
if( (x > stalkerx && x < (stalkerx+stalkerwidth)) && (y > stalkery && y < (stalkery+stalkerheight))) return true;
else return false;
}
function grabIt(e) {
if(IE) {
whichIt = event.srcElement;
while (whichIt.id.indexOf("id2") == -1) {
whichIt = whichIt.parentElement;
if (whichIt == null) { return true; }
}
whichIt.style.pixelLeft = whichIt.offsetLeft;
whichIt.style.pixelTop = whichIt.offsetTop;
currentX = (event.clientX + document.body.scrollLeft);
currentY = (event.clientY + document.body.scrollTop);
} else {
window.captureEvents(Event.MOUSEMOVE);
if(checkFocus (e.pageX,e.pageY)) {
whichIt = document.id2;
stalkerTouchedX = e.pageX-document.id2.pageX;
StalkerTouchedY = e.pageY-document.id2.pageY;
}
}
return true;
}
function moveIt(e) {
if (whichIt == null) { return false; }
if(IE) {
newX = (event.clientX + document.body.scrollLeft);
newY = (event.clientY + document.body.scrollTop);
distanceX = (newX - currentX);    distanceY = (newY - currentY);
currentX = newX;    currentY = newY;
whichIt.style.pixelLeft += distanceX;
whichIt.style.pixelTop += distanceY;
if(whichIt.style.pixelTop < document.body.scrollTop) whichIt.style.pixelTop = document.body.scrollTop;    if(whichIt.style.pixelLeft < document.body.scrollLeft) whichIt.style.pixelLeft = document.body.scrollLeft; if(whichIt.style.pixelLeft > document.body.offsetWidth - document.body.scrollLeft - whichIt.style.pixelWidth - 20) whichIt.style.pixelLeft = document.body.offsetWidth - whichIt.style.pixelWidth - 20;
if(whichIt.style.pixelTop > document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5) whichIt.style.pixelTop = document.body.offsetHeight + document.body.scrollTop - whichIt.style.pixelHeight - 5;
event.returnValue = false;
} else {
whichIt.moveTo(e.pageX-StalkerTouchedX,e.pageY-StalkerTouchedY);
if(whichIt.left < 0+self.pageXOffset) whichIt.left = 0+self.pageXOffset;
if(whichIt.top < 0+self.pageYOffset) whichIt.top = 0+self.pageYOffset;
if( (whichIt.left + whichIt.clip.width) >= (window.innerWidth+self.pageXOffset-17)) whichIt.left = ((window.innerWidth+self.pageXOffset)-whichIt.clip.width)-17;
if( (whichIt.top + whichIt.clip.height) >= (window.innerHeight+self.pageYOffset-17)) whichIt.top = ((window.innerHeight+self.pageYOffset)-whichIt.clip.height)-17;
return false;}
return false;
}
function dropIt() {
whichIt = null;
if(NS) window.releaseEvents (Event.MOUSEMOVE);
return true;
}

if(NS) {
window.captureEvents(Event.MOUSEUP|Event.MOUSEDOWN);
window.onmousedown = grabIt;
window.onmousemove = moveIt;
window.onmouseup = dropIt;
}
if(IE) {
document.onmousedown = grabIt;
document.onmousemove = moveIt;
document.onmouseup = dropIt;
}
if(NS || IE) action = window.setInterval("heartBeat()",1)</script>
</head>
<body>
<p> </p>
<div id="id2">
这里可以放内容，或者添加div用innerhtml进行添加内容就可以了
<br/><input name="Button1" type="button" value="button" onclick="hide()"/>
</div>
<div id="id1">123</div>
<form method="post">
<input name="Button2" type="button" value="button" onclick="show()"/>
</form>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
</body>
</html>

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