function validate(frm){
		if(frm.ModelID.selectedIndex == 0 && 
			frm.Serial.value.length == 0 && 
			frm.BodyID.selectedIndex == 0 && 
			frm.Criteria.value.length == 0){
			alert("Some search criteria is required.");
			return false;
		}
		if(frm.Criteria.value.length > 0){
			if(frm.Criteria.value.length <= 2){
				alert("Keyword is too short");
				frm.Criteria.select();
				return false;
			}
		}
		if(frm.Serial.value.length > 0){
			if(!IsNumeric(frm.Serial.value)){
				alert("Invalid Serial Number");
				frm.Serial.select();
				return false;
			}
		}
		
	}
	function IsNumeric(sText){
		var ValidChars  = "0123456789";
		var IsNumber    = true;
		var Char;
		for (i = 0; i < sText.length && IsNumber == true; i++){ 
			Char = sText.charAt(i); 
			if (ValidChars.indexOf(Char) == -1){
				IsNumber = false;
			}
		}
		return IsNumber;
	}