function checkTraderLoginForm(userName, password, subButton)
{
	/* 
		This function checks if the username and password if filled in, only if the subit button
		value is equal to 'Login'.		
	*/
	if (subButton.value=="Login") {
	
		if (validInput(userName)) {
		
			if (validInput(password)) {
			}
			else {
				
				alert("Please fill in your password!");
				password.focus();
				return false;
			}		
		}
		else {
			
			alert("Please fill in your user name!");
			userName.focus();
			return false;
		}
	} 
	else {
	
		return true;
	}		
}