ajax批量删除

<td><input type="checkbox" name="check" value="{$vo.id}">{$vo.id}</td>
<input type="button" class="del_all" value="批量刪除">

//批量刪除
$(document).on("click",".del_all",function () {
var check = document.getElementsByName("check");
var str= "";
for (i=0;i<check.length;i++) {
if (check[i].checked == true) {
str += "," + check[i].value;
}
}
var id = str.substr(1);alert(id)
$.ajax({
url:"{:url('Index/del_January_table')}",
type:"get",
datatype:"json",
data:{
id:id,
},
success:function (data) {
if (data==1){
alert("刪除成功");
history.go(0);
} else {
alert("刪除失敗")
}
}
});
})