function trim(str)
{
	return str.replace(/^\s*|\s*$/g,"");
}

function isValidEmail(str)
{
	var emailpattern = /^([a-zA-Z0-9\'])+([\.a-zA-Z0-9_\-\'])*@([a-zA-Z0-9])+(\.[a-zA-Z0-9_-]+)+$/;
	return(emailpattern.test(str));
}