function move(e) {
e = e || window.event;
var x = e.offsetX;
var y = e.offsetY;
x = x - document.body.scrollLeft;
y = y - document.body.scrollTop;
document.onmousemove = function (e) {
e = e || window.event;
o.style.left = (e.clientX - x) + "px";
o.style.top = (e.clientY - y) + "px";
};
document.onmouseup = function () {
document.onmousemove = null;
};
};
var x = e.offsetX || e.layerX;
var y = e.offsetY || e.layerY;
var x = e.clientX
var y = e.clientY