function validateField(context) {
    	var employee = context.currentRecord;
    	
    	if (context.fieldId == 'custentity_sdr_employee_code') {
    		var empCode = employee.getValue('custentity_sdr_employee_code');
    		
    		if (empCode == 'x') {
    			alert('Try Again');
    			console.log(empCode);
    			return false;
    		}
    	}
    	return true;
    }