function validPostcode(pc){	
	var filter  = /^[0-9]{4}\s?[a-z]{2}$/i;
	return filter.test(pc);
}

function validEmail(emailAddr)
{
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	return filter.test(emailAddr)
}

function validNickName(val)
{
	var filter  = /^([a-zA-Z0-9])+$/;
	return filter.test(val) && (val.length <= 12)
}

function validPassword(val)
{
	var filter  = /^([-a-zA-Z0-9!@$%^&*])+$/
	return filter.test(val) && (val.length >= 4)
}

function isNumeric(val){
	var filter  = /^([0-9])+$/
	return filter.test(val);
}