How to pass Client side java-script return value to asp classic server side

[SkyNET]

javascript\[code\] function test(abc) { var ddlArray = new Array(); var ddl = document.getElementById('AdjusterList'); for (i = 0; i < ddl.options.length; i++) { ddlArray = ddl.options.value; } var indexsel = ddl.selectedIndex; return indexsel ; }\[/code\]ASP\[code\] strArrayCRN = osRecordSet.RecordCount strArrayCRN2 = osRecordSet2.RecordCount dim StrCount StrCount =strArrayCRN+strArrayCRN2\[/code\]HTML +ASP\[code\]<select name="AdjusterList" id="AdjusterList" onchange='test("<%=StrCount%>")'><%%> <option value="http://stackoverflow.com/questions/11446502/0">Please choose an option from the list.</option> <% Do While (osRecordSet.EOF = False) %><option value="http://stackoverflow.com/questions/11446502/<%=osRecordSet.RowPosition%>"> <%=osRecordSet.Fields("NAME")%></option> <% osRecordSet.MoveNext Loop %><% Do While (osRecordSet2.EOF = False) %><option value="http://stackoverflow.com/questions/11446502/<%=osRecordSet2.RowPosition%>"> <%=osRecordSet2.Fields("NAME")%></option> <% osRecordSet2.MoveNext Loop %>\[/code\] Here i want to pass the return value of function test() i.e value of the selected index to asp server side