function checkrequired(which) {
		var pass=true;
		if (document.images) {
			for (i=0;i<which.length;i++) {
				var tempobj=which.elements[i];
				if (tempobj.name.substring(0,0)=="") {
					if (((tempobj.type=="text"||tempobj.type=="textarea")&&
					tempobj.value=='')||(tempobj.type.toString().charAt(0)=="s"&&
					tempobj.selectedIndex==0)) {
						pass=false;
						break;
				        }
				}
			}
		}
		
		if (!pass) {
			shortFieldName=tempobj.name.substring(0,30);
			switch (shortFieldName) {
				case "CustomerName": 		shortFieldName = "Name"; break;
				case "CustomerEmail": 		shortFieldName = "Email Address"; break;
				case "CustomerTelephone": 	shortFieldName = "Telephone Number"; break;
				case "CustomerAddress01": 	shortFieldName = "Address"; break;
				case "CustomerTown": 		shortFieldName = "Town/City"; break;
				case "CustomerPostcode": 	shortFieldName = "Postcode"; break;
			}
			alert('Please enter your '+shortFieldName+'');
			tempobj.focus();
			return false;
		}
		else
		return true;
}