function validateEmail(email) {
   var reg = /^([A-Za-z0-9_\-\.\&])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   
   return ((reg.test(email) == false) ? false : true);
}

function do_redirect(url, target) {
	if (target == 'blank' || target == '_blank') {
		window.open(url, 'blank');
	} else {
		this.document.location.href = url;		
	}	
}