发布于 2017-03-03 03:16:24 | 118 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Javascript教程，程序狗速度看过来！
JavaScript客户端脚本语言
Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。
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，也希望大家多多支持phperz。