function emptyFieldCheck(field, default_txt)
{
	if(default_txt == undefined) default_txt = '';
	
	if(field.val().length <= 0 || field.val() == null || field.val() == default_txt)
	{
		return false;
	}
	else
	{
		return true;
	}
}

function isNumCheck(field)
{
	if(isNaN(field.val()) || field.val() == '')
	{
		return false;
	}
	else
	{
		return true;
	}
}

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

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

function validZipCheck(field)
{
	var filter = new RegExp(/(^\d{5}$)|(^\d{5}-\d{4}$)/);
	
	if (!filter.test(field.val())) 
	{
		return false;
	}
	else
	{
		return true;
	}
}

function selectOneCheck(field, field_default)
{	
	if(field.val() == field_default)
	{
		return false;
	}
	else
	{
		return true;
	}
}

function radioCheck(field)
{
	if(field.val() === undefined)
	{
		return false;	
	}
	else
	{
		return true;
	}
}