function getDocHeight(doc){ //在IE中doc.body.scrollHeight的可信度最高 //在Firefox中,doc.height就可以了 var docHei = 0; var scrollHei;//scrollHeight var offsetHei;//offsetHeight,包含了边框的高度 if (doc.height){ //Firefox支持此属性,IE不支持 docHei = doc.height; }else if (doc.body){ //在IE中,只有body.scrollHeight是与当前页面的高度一致的, //其他的跳转几次后就会变的混乱,不知道是依照什么取的值! //似乎跟包含它的窗口的大小变化有关 if(doc.body.offsetHeight) docHei = offsetHei = doc.body.offsetHeight; if(doc.body.scrollHeight) docHei = scrollHei = doc.body.scrollHeight; }else if(doc.documentElement){ if(doc.documentElement.offsetHeight) docHei = offsetHei = doc.documentElement.offsetHeight; if(doc.documentElement.scrollHeight) docHei = scrollHei = doc.documentElement.scrollHeight; } /* docHei = Math.max(scrollHei,offsetHei);//取最大的值,某些情况下可能与实际页面高度不符! */ return docHei; } function getTiptopWindow(win){ var cwindow = null; if(win){ cwindow = win; }else{ cwindow = window } while(true){ var pwindow = cwindow.parent; if(cwindow == pwindow){ break; } cwindow = pwindow; } return cwindow; }
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?使用方法:
var docHei = getDocHeight(getTiptopWindow(this).document);
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