checkbox 触发两次问题

function itemList_check(itemList) {

debugger;

if (itemList.type != "checkbox") {

$(itemList).find(":checkbox").click(function () {

itemList.stopPropagation();

});

}

else {

var m=$(itemList).attr("index_item");

var checkAll = $(itemList).is(':checked');

alert(checkAll);

if (checkAll) {

data[m].AffairReciveType = 1;

alert("选择");

return;

}

else {

//data[m].AffairReciveType = 0;

alert("不选择");

}

}

}