获取元素的绝对位置

//获取元素的纵坐标
function getTop(e) {
var ffset = e.offsetTop;
while (e.offsetParent != null) {
e = e.offsetParent;
ffset += e.offsetTop + ("\v" == "v" ? e.clientTop : 0);
}
return ffset;
}
//获取元素的横坐标
function getLeft(e) {
var ffset = e.offsetLeft;
while (e.offsetParent != null && e.id != "content") {
e = e.offsetParent;
ffset += e.offsetLeft + ("\v" == "v" ? e.clientLeft : 0);
}
return ffset;
}