JQUERY多选框，单选框，检查选中的值

var str="";
$(":checkbox:checked").each(function(){
if($(this).attr("checked")){
str += $(this).val()+","
}
})

var cval = ($(":checkbox:checked").val());

var beixuan = document.getElementsByName("goodsExchangeableCon[]").length;
var k = 0;
for(var i = 0; i < beixuan; i++){
if(document.getElementsByName("goodsExchangeableCon[]")[i].checked == true){
k = k+1;
}
}