JS 获取鼠标点击位置

//鼠标点击位置
$("body").click(function(event){
var pos = getMousePos(event);

alert(pos.y);

var Y1 = $('#olapData').offset().top;
//获取相对(父元素)位置:
var Y2 = $('#olapData').position().top;

alert(Y1);
alert(Y2);

posy.val(pos.y);
});

function getMousePos(event) {
var e = event || window.event;
var scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;
var scrollY = document.documentElement.scrollTop || document.body.scrollTop;
var x = e.pageX || e.clientX + scrollX;
var y = e.pageY || e.clientY + scrollY;
return { 'x': x, 'y': y };
}