//获取文档完整的高度
function
getScrollHeight() {
return
Math.max(document.body.scrollHeight, document.documentElement.scrollHeight);
}
//获取当前可视范围高度
function
getClientHeight() {
var
clientheight = 0;
if
(document.body.clientHeight && document.documentElement.clientHeight) {
clientheight = Math.min(document.body.clientHeight, document.documentElement.clientHeight);
}
else
{
clientheight = Math.max(document.body.clientHeight, document.documentElement.clientHeight);
}
return
clientheight;
}
//获取滚动条的高度
function
getScrollTop() {
var
scrollTop = Math.max(document.documentElement.scrollTop, document.body.scrollTop);
return
scrollTop;
}
