Need help on sending javascript variable to ASP

ok this code, I got a href link that works with a counter for the value in a javascript variable, i put that value in a hidden field, then assign that value to a javascript variable.

But it's not working, can anyone help me?

Loccustom=request.form("custom")

<input type="hidden" name="custom" value="" />
</form>

var global=0;
function dynamic()
{
var tmp=1;
global=global+tmp;
alert(tmp)
alert(global)
document.frm.custom.value=global;
}



<% if len(Loccustom)=0 then
else%>
<tr>
<td height="15" colspan="3" valign="top"><table width="100%" border="0" cellpadding="0" cellspacing="0">
<!--DWLayoutTable-->

<tr>
<td width="244" height="15" align="center" valign="middle"><!--DWLayoutEmptyCell-->&nbsp;</td>
<td width="168" align="center" valign="middle"><!--DWLayoutEmptyCell-->&nbsp;</td>
<td width="163" align="center" valign="middle"><!--DWLayoutEmptyCell-->&nbsp;</td>
</tr>
</table>
</td>
</tr> <%end if%>
<tr>
<td height="15" colspan="3" valign="middle">&nbsp;&nbsp;<a href="javascript:dynamic();">Click here to add charges not in selection</a></td>
</tr>

You aren't getting the value because you haven't submitted the form yet (at least not in the snippet you provided).

And because ASP is server-side and JS is client-side, something has to happen to reload the page first.

Have you tried modifying your dynamic() function to include a document.frm.submit()? That would force the Request.Form() to take on the value that JS has submitted.

If you want javascript to communicate with ASP dynamically then you can use Ajax to call the ASP script, passing the variable in a querystring.