JS参数传递,该如何解决

document.frm.action="?do=info&action=submit&id=<!--{$meminfo1.member_id}-->&fee=fee";

$fee=empty($_GET['fee'])?'':trim($_GET['fee']);

<SCRIPT Language = javascript>
function fee(){
  var num=0;
var num1=0;
var sum=0;
var fee=0;
var value=10;
  var boxObj = document.getElementsByName("checkbox[]");
var cbox = document.getElementsByName("cbox[]");
  
  for(i=0;i<boxObj.length;i++){
  if(boxObj[i].checked){
  num++;
  }
  }
for(i=0;i<cbox.length;i++){
  if(cbox[i].checked){
  num1++;
  }
  }
sum=num+num1;
fee=sum*value;
  if(!confirm("您一共选择了"+sum+"条收费项目，查看所选收费项目将从您的账户扣除"+fee+"元。是否确认支付？")) 
  {return false;}
else {
document.frm.action="?do=info&action=submit&id=<!--{$meminfo1.member_id}-->&fee=fee";document.frm.submit();}  
}
</script>

document.frm.action="?do=info&action=submit&id=<!--{$meminfo1.member_id}-->&fee=fee";

document.frm.action="?do=info&action=submit&id=<!--{$meminfo1.member_id}-->&fee="+fee;