下面小编就为大家带来一篇js 弹出对话框(遮罩)透明,可拖动的简单实例。小编觉得挺不错的，现在就分享给大家，也给大家做个参考。
js 弹出对话框(遮罩)透明,可拖动的简单实例
<html>
<head>
<script>
function sAlert(txt)
{
//var eSrc=(document.all)?window.event.srcElement:arguments[1];
var shield = document.createElement("DIV");
shield.id = "shield";
shield.style.position = "absolute";
shield.style.left = "0px";
shield.style.top = "0px";
shield.style.width = "100%";
//window.alert(document.body.scrollHeight);
shield.style.height = document.body.scrollHeight+"px";
shield.style.background = "white";
shield.style.textAlign = "center";
shield.style.zIndex = "10000";
shield.style.filter = "alpha(opacity=80)";
shield.style.opacity = 0.8;
//shield.style.border-width=thick;
strHtml = "<input type=\"button\" value=\" 确 定 \" id=\"do_OK\" onclick=\"doOk()\" />\n";
shield.innerHTML = strHtml;
document.body.appendChild(shield);
this.doOk = function(){
document.body.removeChild(shield);
}
document.getElementById("do_OK").focus();
}
</script>
</head>
<body >
<input type=button onclick="sAlert('登陆成功！')" value=登陆>
<p align=center><select><option>---</option></select></p>
</body>
</html>
------------------------------------------------------
<html>
<head>
<script>
var dragapproved=false
var minrestore=0 //该变量表示窗口目前的状态，0表示初始化状态，1表示最大化状态
var initialwidth,initialheight
//若Client浏览器为IE5.0以上版本的
var ie5=document.all&&document.getElementById
//若Client浏览器为NetsCape6。0版本以上的
var ns6=document.getElementById&&!document.all
function iecompattest(){
return (!window.opera && document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}
function drag_drop(e){
if (ie5&&dragapproved&&event.button==1){
document.getElementById("dwindow").style.left=tempx+event.clientX-offsetx+"px"
document.getElementById("dwindow").style.top=tempy+event.clientY-offsety+"px"
}
else if (ns6&&dragapproved){
document.getElementById("dwindow").style.left=tempx+e.clientX-offsetx+"px"
document.getElementById("dwindow").style.top=tempy+e.clientY-offsety+"px"
}
}
function initializedrag(e){
offsetx=ie5? event.clientX : e.clientX
offsety=ie5? event.clientY : e.clientY
document.getElementById("dwindowcontent").style.display="none" //此句代码可不要
tempx=parseInt(document.getElementById("dwindow").style.left)
tempy=parseInt(document.getElementById("dwindow").style.top)
dragapproved=true
document.getElementById("dwindow").onmousemove=drag_drop
}
function loadwindow(width,height){
if (!ie5&&!ns6) //若不为IE或Netscpae浏览器，则使用一般的Window.open进行弹出窗口处理
//window.open(url,"","width=width,height=height,scrollbars=1")
{
}
else{
document.getElementById("dwindow").style.display='';
document.getElementById("dwindow").style.width=initialwidth=width+"px";
document.getElementById("dwindow").style.height=initialheight=height+"px";
document.getElementById("dwindow").style.left="300px";
document.getElementById("dwindow").style.top=ns6? window.pageYOffset*1+30+"px" : iecompattest().scrollTop*1+30+"px";
//document.getElementById("cframe").src=url
}
}
function maximize(){
if (minrestore==0){
minrestore=1 //maximize window
document.getElementById("maxname").setAttribute("src","layout.png")
document.getElementById("dwindow").style.width=ns6? window.innerWidth-20+"px" : iecompattest().clientWidth+"px"
document.getElementById("dwindow").style.height=ns6? window.innerHeight-20+"px" : iecompattest().clientHeight+"px"
}
else{
minrestore=0 //restore window
document.getElementById("maxname").setAttribute("src","layout.png")
document.getElementById("dwindow").style.width=initialwidth
document.getElementById("dwindow").style.height=initialheight
}
document.getElementById("dwindow").style.left=ns6? window.pageXOffset+"px" : iecompattest().scrollLeft+"px"
document.getElementById("dwindow").style.top=ns6? window.pageYOffset+"px" : iecompattest().scrollTop+"px"
}
function closeit(){
document.getElementById("dwindow").style.display="none"
}
function stopdrag(){
dragapproved=false;
document.getElementById("dwindow").onmousemove=null;
document.getElementById("dwindowcontent").style.display="" //extra
}
</script>
</head>
<body>
<div id="dwindow" style="position:absolute;background-color:#EBEBEB;cursor:hand;left:0px;top:0px;display:none" onMousedown="initializedrag(event)" onMouseup="stopdrag()" onSelectStart="return false">
<div align="right" style="background-color:navy">
<img src="layout.png" id="maxname" onClick="maximize()">
<img src="icon_delete.gif" onClick="closeit()"></div>
<div id="dwindowcontent" style="height:100%">
</div>
</div>
<input type="button" value="弹出窗口" onclick='loadwindow(300,200);'>
</body>
</html>
以上这篇js 弹出对话框(遮罩)透明,可拖动的简单实例就是小编分享给大家的全部内容了，希望能给大家一个参考
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