function ValidateReservation()
{
	var variables = new Array("am", "cod");
	
	var totalVariables = 2;
	k = 0;
	for(var i in variables)
	{
		k++;
		if(k <= totalVariables)
		{
			var id = variables[i];
			document.getElementById(id + '_error').style.display = "none";
		}
	}
	
	any_error = false;
	
	k = 0;
	for(var i in variables)
	{
		k++;
		if(k <= totalVariables)
		{
			var id = variables[i];
			if(document.getElementById(id).value == "")
			{
				document.getElementById(id + '_error').style.display = "block";
				any_error = true;
			}
		}
	}
	
	if(any_error)
	{
		alert('Please fill all the required fields.');
		return false;
	}else
		return true;
}