// button & field event function
		function btn(inId,source) {
			inId.src=source;
		}
		
		// field event function
		 function fld(fldId,source) {
			fldId.style.backgroundImage=source;
		}
		
		// search validation
		 function searchValidate(frmId,fldId) {
			 if (!document.getElementById(fldId).value || document.getElementById(fldId).value.charAt(0)==" ") {
				 document.getElementById(fldId).value="";
				 document.getElementById(fldId).focus();
				 alert("please enter a search term");
				 return false;
			 }else{
				 frmId.submit();
			 }
		 }