获取页面高度和滚屏部分高度兼容css2.0

function bodyHeight(){ var cobj = document.body; while(cobj.scrollTop == 0 && cobj.parentNode) { if(cobj.tagName.toLowerCase() == 'html') break; cobj = cobj.parentNode; } return cobj.clientHeight; } function scrolltop(){ var cobj = document.body; while(cobj.scrollTop == 0 && cobj.parentNode) { if(cobj.tagName.toLowerCase() == 'html') break; cobj = cobj.parentNode; } return cobj.scrollTop; }