click獲取checkbox的值

<span style="font-size:18px;">//click獲取ckeckbox值
	function addvalue(obj) {
		var checked = $(obj).attr("checked");
		if (checked) {
			if (allarr.length > 0) {
				for ( var i = 0; i < allarr.length; i++) {
					if (allarr[i] != $(obj).val()) {
						allarr.push($(obj).val());
						break;
					}
				}
			} else {
				allarr.push($(obj).val());
			}
		} else {
			for ( var i = 0; i < allarr.length; i++) {
				if (allarr[i] == $(obj).val()) {
					allarr.splice(i, 1);
				}
			}
		}
	}</span>