Multiple checkbox data post to the another page

[awahab]

In this form checkbox. checked data post to the another page.

I couldn't find the error on this code please help me.

<script language="javascript">
     function add_variation()
     {
            var arr = new Array();
            $(".add_var").each(function()
            {  
                if($(this).attr("checked"))
                {arr.push($(this).val());}
            });
            
            
            if(arr.length > 0)
            {  $("#add_var_pid").val(arr); }
            else
            { alert("At least one product should be select");
              $("#add_var_pid").val('');
              return false;
            }

     }
</script>

<form name="addvar" id="addvar" method="post" action="/cart/verify.asp" onsubmit="return add_variation();">
          <table width="580" border="0" align="center" cellpadding="0" cellspacing="0" style="BORDER: 1px #FFFFFF solid;">
            <tr  bgcolor="#A48F50">
              <td width="74%" height="18"class="PNameDetail"><b>Product Name</b></td>
              <td bgcolor="#FFFFFF"  height="15"><img src="/images/spacer.gif" alt="gif img" width="2" /></td>
              <td width="10%" height="18" align="center" class="PNameDetail"><b>Price</b></td>
              <td bgcolor="#FFFFFF"  height="15"><img src="/images/spacer.gif" alt="gif img" width="2" /></td>
              <td width="8%" height="18" align="center" class="PNameDetail"><b>Save</b></td>
              <td bgcolor="#FFFFFF"  height="15"><img src="/images/spacer.gif" alt="gif img" width="2" /></td>
              <td width="8%" height="18" align="center" class="PNameDetail"><b>Select</b></td>
            </tr>
            <%
							While Not RsProductVariation.EOF
								If bgcolor = "#F7F6FE" Then bgcolor = "#E7E4F7" Else bgcolor = "#F7F6FE"
								ProductNameFormat = ProductName
								If Len(RsProductVariation("Potency")) > 0 Then ProductNameFormat = ProductNameFormat & " " & RsProductVariation("Potency")
								If Len(RsProductVariation("Flavour")) > 0 Then ProductNameFormat = ProductNameFormat & " " & RsProductVariation("Flavour") %>
			<tr  bgcolor="<%=bgcolor%>">
			  <td width="74%" class="pd-productvariation">&nbsp;<a href="<%=GetISAPI(RsProductVariation("PID")  & "|" &  RsProductVariation("Name"),"product")%>" rel="nofollow"><%=ProductNameFormat%>&nbsp;<%=RsProductVariation("Quantity")%></a></td>
			  <td bgcolor="#FFFFFF" height="20"><img src="/images/spacer.gif" alt="gif img" width="2" /></td>
			  <td width="10%" class="pd-productvariation" align="center"><%=FormatCurrency(RsProductVariation("Price"), 2)%></td>
			  <td bgcolor="#FFFFFF" height="20"><img src="/images/spacer.gif" alt="gif img" width="2" /></td>
			  <td width="8%" class="pd-productvariation" align="center"><%=Round(((( RsProductVariation("MSRP")-RsProductVariation("Price") )/RsProductVariation("MSRP")) * 100),0)%>%</td>
			  <td bgcolor="#FFFFFF" height="20"><img src="/images/spacer.gif" alt="gif img" width="2" /></td>
			  <td width="8%" align="center"><input name="add_var" id="add_var" type="checkbox" class="add_var" value="<%=Rs("PID")%>"/></td>
            </tr>
            <%
								RsProductVariation.MoveNext
								Wend%>
          </table>
          </td>
          
          </tr>
          
          <tr>
            <td width="58" align="right">&nbsp;
    	      <input type="image"  name="img" value="img" src="/images/pdetail-addtocart.png" align="bottom" />
			  <input type="hidden" name="add_var_pid" id="add_var_pid" value="" /></td>
          </tr>
          <tr>
            <td height="10" style="border-left:1px solid #CCCCCC; border-right:1px solid #CCCCCC"></td>
          </tr>
        </form>

[Dormilich]

what error?

how does ASP handle multiple URL parameters of the same name?