监听url

    var _clickEngine = function(e){
        var event = e || window.event;
        var target = event.srcElement || event.target;
        if (target && target.tagName == 'A' && target.target == '_blank'){
            if(target.href.indexOf('xx.xx.com') != -1){
                //相关处理
                if (event.target) {
                    event.stopPropagation();
                    event.preventDefault();
                } else {
                    event.cancelBubble = true;
                    event.returnValue = false;
                }
            }
        }
    };