//Validate.js

var message_mail = "";
var message_name = "";



function validName(str,titulo) {
	var result = true;	
	if (str == "") {
		message_name = "The " + titulo + " field cannot be empty\n";
		alert(message_name);
		result = false;
	}	
	return result;
}



function validEmail(str) {	
	var result  = true;
	var AtSym    = str.indexOf('@');
	var Period   = str.lastIndexOf('.');
	var Space    = str.indexOf(' ');
	var Length   = str.length - 1;   // Array is from 0 to length-1
	if (str == "") {
		message_mail = "You must write your e-mail address\n";
		alert(message_mail);
		result = false;
	}
	else {
		if ((AtSym < 1) ||  (Period <= AtSym+1) ||  (Period == Length ) ||  (Space  != -1)) {  
			  message_mail ="Your email address has an invalid format\n";
   		  	  alert(message_mail);
			  result = false;	
		}		
	}			
	return result;
}

function validLength() {
	var result = false;	
	var text=window.document.form1.comments.value;
	var longitud=text.length;
	if (longitud>=499) {
		alert("Your comments exceeded 500 characters");
		result = false;
	}
	else {
		result = true;
	}
	return result;	
}