stopPropagation

function stopPropagation(e) {
    e = e || window.event;
    if(e.stopPropagation) { //W3C阻止冒泡方法
        e.stopPropagation();
    } else {
        e.cancelBubble = true; //IE阻止冒泡方法
    }
}
document.getElementById(‘need_hide‘).onclick = function(e) {
    stopPropagation(e);
}