多瀏覽器兼容的獲取元素和鼠標的位置的js代碼_javascript技巧

代碼如下:
//獲取元素的位置
function getLeft(obj) {
if (obj == null)
return null;
var mendingObj = obj;
var mendingLeft = mendingObj.offsetLeft;
while (mendingObj != null && mendingObj.offsetParent != null && mendingObj.offsetParent.tagName != "BODY") {
mendingLeft = mendingLeft + mendingObj.offsetParent.offsetLeft;
mendingObj = mendingObj.offsetParent;
}

return mendingLeft;
};
function getTop(obj) {
if (obj == null)
return null;
var mendingObj = obj;
var mendingTop = mendingObj.offsetTop;
while (mendingObj != null && mendingObj.offsetParent != null && mendingObj.offsetParent.tagName != "BODY") {
mendingTop = mendingTop + mendingObj.offsetParent.offsetTop;
mendingObj = mendingObj.offsetParent;
}
return mendingTop;
};
//獲取鼠標的位置
function getMousePosition(event) {
var position = {
MouseX: 0,
MouseY: 0
}
if (event.pageX != undefined) {
position.MouseX = event.pageX;
position.MouseY = event.pageY;
}
else {
var target = EventUtil.getTarget(event);
position.MouseX = event.offsetX + getLeft(target);
position.MouseY = event.offsetY + getTop(target);

}
return position;

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