轉(zhuǎn)自：http://www.cnblogs.com/rhythmK/archive/2009/07/20/1526936.html

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//創(chuàng)建遮罩層
????function?createMask(){
????????var?sWidth,sHeight;
????????sWidth?=?window.screen.availWidth;
????????//屏幕可用工作區(qū)高度：?window.screen.availHeight;
????????//屏幕可用工作區(qū)寬度：?window.screen.availWidth;
????????//網(wǎng)頁正文全文寬：?????document.body.scrollWidth;
????????//網(wǎng)頁正文全文高：?????document.body.scrollHeight;
????????if(window.screen.availHeight?>?document.body.scrollHeight){??//當(dāng)高度少于一屏
????????????sHeight?=?window.screen.availHeight;??
????????}else{//當(dāng)高度大于一屏
????????????sHeight?=?document.body.scrollHeight;?
????????????
????????????
????????????$("<div?id=\"webMask\"></div>").appendTo("body");
????????????
????????????$("#webMask").css({posotion:"absolute",top:"0px",left:"0px",background:"#777",filter:"Alpha(opacity=60)",opacity:"0.6",width:sWidth+"px",height:sHeight+"px",zIndex:"100"});??
????????}

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轉(zhuǎn)載于:https://www.cnblogs.com/bluewind2879/archive/2010/05/07/1729567.html

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