function comboChangeCheck (ptp)
{ 
	//select = document.mainForm.ptp;
	var selVal = ptp.options[ptp.selectedIndex]['value'] ;
	//alert (selVal);
	switch (ptp.name) {
		case 'country': 
			if (selVal=='US') {
				changeObjectVisibility('divCounty', 'none'); 
				changeObjectVisibility('divState', 'block');
			} else {
				changeObjectVisibility('divCounty', 'block');
				changeObjectVisibility('divState', 'none');
			} break;
		case 'businesstype':
			if (selVal=='null') {
				document.getElementById('other').disabled=false;
				document.getElementById('other').style.backgroundColor='white';
			} else {
				document.getElementById('other').disabled=true; 
				document.getElementById('other').style.backgroundColor='#d8d8d8';
		} break; 
	}
}