function rrchk(fld,fldid)
{
	
	// set isrr to 1 if rr option is chosen
	if((document.getElementById('opt3')) && (document.getElementById('opt3').checked == true))
	{
		document.forms['signup'].elements['isrr'].value = 1;
	}else{
		document.forms['signup'].elements['isrr'].value = 0;
	}	
	
	
	// click on sil aid
	if((fld == 'aid') && (fldid == '3'))
	{
		//check if rr opt already clicked, if so : deny
		if((document.getElementById('opt3')) && (document.getElementById('opt3').checked == true))
		{
			var msg = "You have already checked the Red Ribbon option.\n";
			msg += "This is only available for Platinum and Gold plans.\n"
			alert(msg);
			document.getElementById('aid3').checked = false;
		}
	}
		
	
	// click on rr opt
	if((fld == 'opt') && (fldid == '3'))
	{
		//check if sil aid already clicked, if so : deny
		if(document.getElementById('aid3').checked == true)
		{
			alert('This option is only available for Platinum and Gold Plans');
			document.getElementById('opt3').checked = false;
		}
	}	
		
}