function emptyField(field) 
{
	if((field.value.length == 0) || (field.value == null)) 
	{
		return true;
	}
	else 
	{ 
		return false; 
	}
}	

function validZip(zip)
{
	var correct = new RegExp(/(^\d{5}$)|(^\d{5}-\d{4}$)/);
	
	if (!correct.test(zip)) 
	{
		return false;
	}
	else
	{
		return true;
	}
}

function validEmail(email)
{
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;

	if(!filter.test(email))
	{
		return false;
	}
	else
	{
		return true;
	}
}

function checkMultipleSelect(id)
{
	var selObj = document.getElementById(id);
	var count = 0;
	for (var i = 0; i < selObj.options.length; i++)
	{
		if (selObj.options[i].selected) 
		{
			count++;
		}
	}
	
	if(count == 0)
	{
		return false;
	}
	else
	{
		return true;
	}
}

function selectOne(id)
{
	var selObj = document.getElementById(id);
	
	if(selObj.selectedIndex == 0)
	{
		return false;
	}
	else
	{
		return true;
	}
}