function verify(f) {
e = f.email.value;
error = "";
if(e.length!=0 && e.length>4) {
			if(e.indexOf("@")==-1 || e.indexOf(".")==-1) {
				
				error="The email address is not valid";
	
			}
			if(e.indexOf(" ")!=-1 || e.indexOf("/")!=-1 || e.indexOf(",")!=-1 || e.indexOf(";")!=-1) {
				error="The email address is not valid";
			}
		} else {
			error="The email address is not valid!";
		}
		if(error!="") {alert(error);return false;
		
	}
}