双击

// 双击 方案，会导致单击至少有200ms的延时
clickInterval = null;
document.getElementById("con").onclick = function (e) {

clearTimeout(clickInterval)

clickInterval = setTimeout(function (e) {
    xy = getXY(e);
    if (xy === null)
        return;
    r = xy + "-" + 1;
    console.log(r);
}, 200, e)

};
document.getElementById("con").ondblclick = function (e) {

clearTimeout(clickInterval)

xy = getXY(e);

if (xy === null)

return;

r = xy + "-" + 3;

console.log(r);

};