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JS最简单的弹出窗口效果

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 2011/7/23 10:05:30 阅读次数:8487

因为看了很多人在找这弹出窗口效果,又不想太复杂所以把我写过的在这里分享给大家!(添加了渐显背景效果)

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>JS最简单的弹出窗口效果http://www.86y.org</title>
<style type="text/css">
html,body{font-size:12px;margin:0px;height:100%;}
#BOX_overlay {background:#666;left:0;position:absolute;top:0;z-index:100;}/**遮罩层的样式**/
#layer_box {background:#fff;border:3px solid #000;position:absolute;display:none;z-index:999;width:600px;} /**弹出窗口的样式**/
.box_title {background:#FFF;border-bottom:1px solid #DDD;margin:10px 10px 0;padding:0 0 5px 20px;} /**关闭栏目**/
.box_title span {font-size:14px;font-weight:bold;}
.box_title a {color:#000;position:absolute;right:10px;top:10px;}
.box_content{padding:10px;margin:10px;}
</style>
<script>
function BOX_show(e,a)//显示
{
    if (document.getElementById(e) == null) {
        return;
    }
    
    if (!a) {
        var selects = document.getElementsByTagName("select");
        for (i = 0; i < selects.length; i++) {
            selects[i].style.visibility = "hidden";
        }
    }

    BOX_layout(e);
    window.onresize = function() { BOX_layout(e); } //改变窗体重新调整位置
    window.onscroll = function() { BOX_layout(e); } //滚动窗体重新调整位置
    document.onkeyup = function(event) {
        var evt = window.event || event;
        var code = evt.keyCode ? evt.keyCode : evt.which;
        //alert(code);

        if (code == 27) {
            BOX_remove(e);
        }
    }
}
function BOX_remove(e)//移除
{
    window.onscroll = null;
    window.onresize = null;
    document.getElementById("BOX_overlay").style.display = "none";
    document.getElementById(e).style.display = "none";

    var selects = document.getElementsByTagName("select");
    for (i = 0; i < selects.length; i++) {
        selects[i].style.visibility = "visible";
    }
}

function BOX_layout(e)//调整位置
{
    var a = document.getElementById(e);

    if (document.getElementById("BOX_overlay") == null)//判断是否新建遮掩层
    {

        var overlay = document.createElement("div");
        overlay.setAttribute("id", "BOX_overlay");
		

        //overlay.onclick=function(){BOX_remove(e);};
        //a.parentNode.appendChild(overlay);
        document.body.appendChild(overlay);
    }
	document.getElementById("BOX_overlay").style.cssText="filter:alpha(opacity=0);-moz-opacity:0;opacity:0;"
	showBackground(document.getElementById("BOX_overlay"),50)
    document.getElementById("BOX_overlay").ondblclick = function() { BOX_remove(e); };
    //取客户端左上坐标,宽,高
    var scrollLeft = (document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft);
    var scrollTop = (document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop);

    var clientWidth;
    if (window.innerWidth) {
        clientWidth = window.innerWidth;
        //clientWidth = ((Sys.Browser.agent === Sys.Browser.Safari) ? window.innerWidth : Math.min(window.innerWidth, document.documentElement.clientWidth));
    }
    else {
        clientWidth = document.documentElement.clientWidth;
    }

    var clientHeight;
    if (window.innerHeight) {
        clientHeight = window.innerHeight;
        //clientHeight = ((Sys.Browser.agent === Sys.Browser.Safari) ? window.innerHeight : Math.min(window.innerHeight, document.documentElement.clientHeight));
    }
    else {
        clientHeight = document.documentElement.clientHeight;
    }

    var bo = document.getElementById("BOX_overlay");
    bo.style.left = scrollLeft + "px";
    bo.style.top = scrollTop + "px";
    bo.style.width ="100%";
    bo.style.height = clientHeight + "px";
    bo.style.display ="";

    //Popup窗口定位
    a.style.display = "block"
    a.style.left = scrollLeft + ((clientWidth - a.offsetWidth) / 2) + "px";
    a.style.top = scrollTop + ((clientHeight - a.offsetHeight) / 2) + "px";
}
function showBackground(obj,endInt)
{
	var isIe=(document.all)?true:false;
	if(isIe)
	{
		obj.filters.alpha.opacity+=2;
		if(obj.filters.alpha.opacity<endInt)
		{
			setTimeout(function(){showBackground(obj,endInt)},5);
			//alert(obj.filters.alpha.opacity);
		}
	}else
	{
		var al=parseFloat(obj.style.opacity);al+=0.01;
		obj.style.opacity=al;
	if(al<(endInt/100))
	{setTimeout(function(){showBackground(obj,endInt)},5);}
	}
}
</script>
</head>

<body>
<a href="javascript:BOX_show('layer_box');">点击弹出窗口</a>
<div id="layer_box">
    <div class="box_title"><span>弹出窗口标题</span><a onclick="BOX_remove('layer_box')" href="javascript:void(0)">关闭</a></div>
    <div class="box_content">弹出窗口内容</div>
</div>
</body>
</html>

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