function ExportToExcel() {
	
		document.frmSubNets.action = "./IPAllocSubNetsExcel.asp";
		document.frmSubNets.submit();
		return true;
	}

// THE ABOVE IS WHERE THE FORM ACTION IS CHANGED & SUBMITTED AFTER WHICH THE DIALOG BOX IS OPENED


<Form Name=frmSubNets Method=Post Action="./IPAllocSubNets.asp">
<Br>
<Center>

<Table Width=95% Align=Center border=0 cellspacing=1 cellpadding=1>
			<Tr><Td><A Href="javascript:ExportToExcel();"><IMG SRC="../images/miniexcel.gif" name="Excel" size="15" border=0><A></Td></Tr>
			
				<Tr>
					<Td Colspan=3><INPUT type="button" value="Select All" name=btnCheckAll  onClick="btnCheckAll_onClick(this);"></Td>
					<Td Colspan=4 nowrap align=center><Font face=verdana color=#0000ff size=2>Join Function only works when sorted on Subnet Column.</Font></Td>
				</Tr>
					
			
			
			<Tr class="TableMainRow">
				<Td class="TableMainRow" Align=Center ColSpan=30>
					<Font face=verdana color=ffffff size=2><B>Sub Nets</B></Font>
				</Td>
			</Tr>

<Input Type=Hidden Name=SubnetId107 Value="760899">
<Input Type=Hidden Name=Subnet107 Value="10.183.18.100/30">

//A LOT LIKE THE ABOVE 2 LINES FOLLOW & PRECEDE...
....


</Form>