js实现可拖动alert div模拟层
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>你可以拖动我吗？</title>
<script language="javascript">
<!--
function cry(){
alert("你可以拖动我吗？")
}
//-->
</script>
<script language="javascript">
<!--
window.alert = function(txt)
{
var shield = document.createElement("DIV");
shield.id = "shield";
shield.style.position = "absolute";
shield.style.left = "0px";
shield.style.top = "0px";
shield.style.width = "100%";
shield.style.height = "100%";
//shield.style.height = document.body.scrollHeight+"px";
shield.style.background = "#000";
shield.style.textAlign = "center";
shield.style.zIndex = "10000";
shield.style.filter = "alpha(opacity=0)";
var alertFram = document.createElement("DIV");
alertFram.id="alertFram";
alertFram.style.position = "absolute";
//负边界居中法,相对于shield层的顶部时
//alertFram.style.left = "50%";
//alertFram.style.top = "50%";
//alertFram.style.marginLeft = "-125px";
//alertFram.style.marginTop = "-75px";
//负边界居中法,相对于shield层的底部时
alertFram.style.right = "50%";
alertFram.style.bottom = "50%";
alertFram.style.marginRight = "-125px";
alertFram.style.marginBottom = "-75px";
alertFram.style.width = "250px";
alertFram.style.height = "150px";
alertFram.style.background = "#000";
alertFram.style.textAlign = "center";
alertFram.style.lineHeight = "150px";
alertFram.style.zIndex = "10002";
strHtml = "<ul style="list-style:none;margin:0px;padding:0px;width:100%">
";
strHtml += "<li onmousedown="oMove(parentNode.parentNode);" title="移動" style="cursor:move;background:#002F9C;text-align:left;padding-left:5px;font-size:14px;font-weight:bold;color: #FFFFFF;height:25px;line-height:25px;border-left:1px solid #FFFFFF;border-top:1px solid #FFFFFF;border-right:1px solid #FFFFFF;">[提示……]</li>
";
strHtml += "<li style="background:#5A7EDC;text-align:center;font-size:12px;color: #FFFFFF;height:120px;line-height:120px;border-left:1px solid #FFFFFF;border-right:1px solid #FFFFFF;">"+txt+"</li>
";
strHtml += "<li style="background:#002F9C;text-align:center;font-weight:bold;height:25px;line-height:25px; border-left:1px solid #FFFFFF;border-bottom:1px solid #FFFFFF;border-right:1px solid #FFFFFF;"><input type=button value= 确定 onclick="remove()"></li>
";
strHtml += "</ul>
";
alertFram.innerHTML = strHtml;
document.body.appendChild(alertFram);
document.body.appendChild(shield);
var c = 0;
this.doAlpha = function(){
if (c++ > 50){clearInterval(ad);return 0;}
shield.style.filter = "alpha(opacity="+c+");";
}
this.remove=function(){
alertFram.innerHTML="";
shield.style.filter = "";
shield.id = "";
shield.style.position = "";
shield.style.left = "";
shield.style.top = "";
shield.style.width = "";
shield.style.height ="";
shield.style.background = "";
shield.style.textAlign = "";
shield.style.zIndex = "";
shield.style.filter = "";
alertFram.id="";
alertFram.style.position = "";
alertFram.style.left = "";
alertFram.style.top = "";
alertFram.style.marginLeft = "";
alertFram.style.marginTop = "";
alertFram.style.width = "";
alertFram.style.height = "";
alertFram.style.background = "";
alertFram.style.textAlign = "";
alertFram.style.lineHeight = "";
alertFram.style.zIndex = "";
}
var ad = setInterval("doAlpha()",10);
alertFram.focus();
document.body.onselectstart = function(){return false;};
}
function oMove(obj){
var otop,oleft;
otop = event.y - obj.offsetTop;
oleft = event.x - obj.offsetLeft;
obj.setCapture();
obj. = function()
{
obj.style.left = event.x - oleft;
obj.style.top = event.y - otop;
}
obj. = function()
{
obj. = null;
obj.style.filter = null;
obj.releaseCapture();
}
}
//-->
</script>
</head>
<body style="margin:0;">
<input type=submit name="cry" value="点击我一下下^_^" style="width: 110px; height: 30px" onClick="cry()"></input>
</body>
</html>
补充：软件开发 , Java ,
