JQuery 弹出层，始终显示在屏幕正中间

class="baidu_pl"> <class="tags" href="/tags/DIV.html" title=div>div id="article_content" class="article_content clearfix"> <class="tags" href="/tags/DIV.html" title=div>div id="content_views" class="htmledit_views">

上一篇是关于遮罩层的展示：链接地址为：http://xutao5641745.iteye.com/blog/1310955

样式代码：

class="language-html">.model{
			position: absolute; z-index: 1003; 
     	 	width:320px; height:320px; text-align:center;
           	background-color:#0066FF; display: none;
		}

class="tags" href="/tags/JQUERY.html" title=jquery>jquery代码：

class="language-class="tags" href="/tags/JAVASCRIPT.html" title=javascript>javascript">//让指定的DIV始终显示在屏幕正中间
	class="tags" href="/tags/FUNCTION.html" title=function>function letDivCenter(class="tags" href="/tags/DIV.html" title=div>divName){ 
		var top = ($(window).height() - $(class="tags" href="/tags/DIV.html" title=div>divName).height())/2; 
		var left = ($(window).width() - $(class="tags" href="/tags/DIV.html" title=div>divName).width())/2; 
		var scrollTop = $(document).scrollTop(); 
		var scrollLeft = $(document).scrollLeft(); 
		$(class="tags" href="/tags/DIV.html" title=div>divName).css( { position : 'absolute', 'top' : top + scrollTop, left : left + scrollLeft } ).show();
	}

HTML代码：

class="language-html"><a href="class="tags" href="/tags/JAVASCRIPT.html" title=javascript>javascript:;" οnclick="letDivCenter('#model')">点我让DIV始终显示在屏幕中间</a><br />
<class="tags" href="/tags/DIV.html" title=div>div>
	<class="tags" href="/tags/DIV.html" title=div>div id="model" class="model">
		这是内容（不过没有垂直居中显示）希望各位高手，能够补充。小弟在此谢过了。
	</class="tags" href="/tags/DIV.html" title=div>div>
</class="tags" href="/tags/DIV.html" title=div>div>

接下来总结一下，将它们整合成一个。即，当弹出ｄｉｖ层的时候，同时也要弹出遮罩层，好，废话不多说，看代码：

class="language-html"><style type="text/css">
	.mask {  
            position: absolute; top: 0px; filter: alpha(opacity=60); background-color: #777;
            z-index: 1002; left: 0px;
            opacity:0.5; -moz-opacity:0.5;
        }
	.model{
			position: absolute; z-index: 1003; 
     	 	width:320px; height:320px; text-align:center;
           	background-color:#0066FF; display: none;
		}
		
</style>

２。Ｊquery代码：

class="language-class="tags" href="/tags/JAVASCRIPT.html" title=javascript>javascript"><script type="text/class="tags" href="/tags/JAVASCRIPT.html" title=javascript>javascript">
	//兼容火狐、IE8
	class="tags" href="/tags/FUNCTION.html" title=function>function showMask(){
		$("#mask").css("height",$(document).height());
		$("#mask").css("width",$(document).width());
		$("#mask").show();
	}
	//让指定的DIV始终显示在屏幕正中间
	class="tags" href="/tags/FUNCTION.html" title=function>function letDivCenter(class="tags" href="/tags/DIV.html" title=div>divName){ 
		var top = ($(window).height() - $(class="tags" href="/tags/DIV.html" title=div>divName).height())/2; 
		var left = ($(window).width() - $(class="tags" href="/tags/DIV.html" title=div>divName).width())/2; 
		var scrollTop = $(document).scrollTop(); 
		var scrollLeft = $(document).scrollLeft(); 
		$(class="tags" href="/tags/DIV.html" title=div>divName).css( { position : 'absolute', 'top' : top + scrollTop, left : left + scrollLeft } ).show();
	}
	class="tags" href="/tags/FUNCTION.html" title=function>function showAll(class="tags" href="/tags/DIV.html" title=div>divName){
		showMask();
		letDivCenter(class="tags" href="/tags/DIV.html" title=div>divName);
	}
</script>

3.HTML代码：

class="language-html"><class="tags" href="/tags/DIV.html" title=div>div id="mask" class="mask"></class="tags" href="/tags/DIV.html" title=div>div>
<a href="class="tags" href="/tags/JAVASCRIPT.html" title=javascript>javascript:;" οnclick="showMask()" >点我显示遮罩层</a><br />
<a href="class="tags" href="/tags/JAVASCRIPT.html" title=javascript>javascript:;" οnclick="letDivCenter('#model')">点我让DIV始终显示在屏幕中间</a><br />
<a href="class="tags" href="/tags/JAVASCRIPT.html" title=javascript>javascript:;" οnclick="showAll('#model')">点我显示所有</a><br />
<class="tags" href="/tags/DIV.html" title=div>div>
	<class="tags" href="/tags/DIV.html" title=div>div id="model" class="model">
		这是内容（不过没有垂直居中显示）希望各位高手，能够补充。小弟在此谢过了。
	</class="tags" href="/tags/DIV.html" title=div>div>
</class="tags" href="/tags/DIV.html" title=div>div>

class="tags" href="/tags/DIV.html" title=div>div> class="tags" href="/tags/DIV.html" title=div>div> <class="tags" href="/tags/DIV.html" title=div>div id="treeSkill">class="tags" href="/tags/DIV.html" title=div>div>