function checkmemail(form,msg){
	var str=document.getElementById(form).email.value;
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i;
	if (filter.test(str)) {
		return true;
	}else{
		document.getElementById(form + '_err').innerHTML = 'Please enter a valid email address!';
		document.getElementById(form + '_err').innerHTML = msg;
		return false;
	}
}