jQuery点击图片放大显示原图效果

HTML部分：
<div id="append_parent"></div>

JS代码部分：

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//内容页图片点击放大效果     var imgBoxMod=$(".ctnlist .text img");     imgPop(imgBoxMod);     //内容页图片点击放大效果函数主体开始     function imgPop(imgBoxMod){         imgBoxMod.each(function(){         //超过最大尺寸时自动缩放内容页图片尺寸         var ctnImgWidth=$(this).width();         if(ctnImgWidth>618){                 $(this).width(618);             }         //点击图片弹出层放大图片效果         $(this).click( function(){             $("#append_parent").html("<div id="imgzoom"><div id="imgzoom_zoomlayer" class="zoominner"><p><span class="y"><a title="在新窗口打开" target="_blank" class="imglink" id="imgzoom_imglink" href="">在新窗口打开</a><a title="关闭" class="imgclose">关闭</a></span></p><div id="imgzoom_img" class="hm"><img src="" id="imgzoom_zoom" style="cursor:pointer"></div></div></div><div id="imgzoom_cover"></div>"); //生成HTML代码             var domHeight =$(document).height(); //文档区域高度             $("#imgzoom_cover").css({"display":"block","height":domHeight});             var imgLink=$(this).attr("src");             $("#imgzoom_img #imgzoom_zoom").attr("src",imgLink);             $("#imgzoom").css("display","block");             imgboxPlace();             })     })             //关闭按钮     $("#append_parent .imgclose").live('click',function(){         $("#imgzoom").css("display","none");         $("#imgzoom_cover").css("display","none");     })         //新窗口打开图片     $("#imgzoom_imglink").live('click',function(){         var imgLink=$("#imgzoom_zoom").attr("src");         $("#imgzoom_imglink").attr("href",imgLink);     })     //弹出窗口位置     function imgboxPlace(){         var cwinwidth=$("#imgzoom").width();         var cwinheight=$("#imgzoom").height();         var browserwidth =$(window).width();//窗口可视区域宽度         var browserheight =$(window).height(); //窗口可视区域高度         var scrollLeft=$(window).scrollLeft(); //滚动条的当前左边界值         var scrollTop=$(window).scrollTop(); //滚动条的当前上边界值         var imgload_left=scrollLeft+(browserwidth-cwinwidth)/2;         var imgload_top=scrollTop+(browserheight-cwinheight)/2;         $("#imgzoom").css({"left":imgload_left,"top":imgload_top});         }     }     //内容页图片点击放大效果函数主体结束

CSS样式部分：

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/* 图片放大弹出层 */ .zoominner {background: none repeat scroll 0 0 #FFFFFF; padding: 5px 10px 10px; text-align: left;} .zoominner p {height:30px; _position:absolute; _right:2px; _top:5px;} .zoominner p a { background: url("../images/imgzoom_tb.gif") no-repeat scroll 0 0 transparent; float: left; height: 17px; line-height: 100px; margin-left: 10px; overflow: hidden; width: 17px;} .zoominner p a.imgadjust {background-position: -40px 0;} .zoominner p a.imgclose { background-position: -80px 0; cursor:pointer;} .y {float: right; margin-bottom:10px;} .ctnlist .text img{ cursor:pointer;} #imgzoom_cover{background-color:#000000; filter:progid:DXImageTransform.Microsoft.Alpha(Opacity=70); opacity:0.7; position:absolute; z-index:800; top:0px; left: 0px; width:100%; display:none;} #imgzoom{ display:none; z-index:801; position:absolute;} #imgzoom_img{_width:300px; _height:200px; min-width:300px; min-height:200px; background:url(../images/imageloading.gif) center center no-repeat;} #imgzoom_zoomlayer{ _width:300px; _height:200px; _position:relative; _padding-top:30px; min-width:300px; min-height:200px;}

效果：

效果演示页： http://www.ipsfan.com/koutu/2011-10-02/77.html

http://rt.ipsfan.com/blog-6-41.html