function get_data() {
	var mydate=new Date()
	var year=mydate.getYear()
	if (year < 1000)
	year+=1900
	var day=mydate.getDay()
	var month=mydate.getMonth()
	var daym=mydate.getDate()
	if (daym<10)
	daym="0"+daym
	var dayarray=new Array("Domingo","Lunes","Martes","Miercoles","Jueves","Viernes","Sabado")
	var montharray=new Array("Enero","Febrero","Marzo","Abril","Mayo","Junio","Julio","Agosto","Septiembre","Octubre","Noviembre","Diciembre")
	document.write(dayarray[day]+", "+daym+" de "+montharray[month]+" de "+year)
}

function get_hora()
{
	var time=new Date(); 
	var any = time.getYear();//hora = now.getHour();	
	document.write(any);
}

function Validate_String(string, return_invalid_chars)
         {
         valid_chars = '1234567890-_.^~abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
         invalid_chars = '';
         
         if(string == null || string == '')
            return(true);
         
         //For every character on the string.   
         for(index = 0; index < string.length; index++)
            {
            char = string.substr(index, 1);                        
            
            //Is it a valid character?
            if(valid_chars.indexOf(char) == -1)
              {
              //If not, is it already on the list of invalid characters?
              if(invalid_chars.indexOf(char) == -1)
                {
                //If it's not, add it.
                if(invalid_chars == '')
                   invalid_chars += char;
                else
                   invalid_chars += ', ' + char;
                }
              }
            }                     
            
         //If the string does not contain invalid characters, the function will return true.
         //If it does, it will either return false or a list of the invalid characters used
         //in the string, depending on the value of the second parameter.
         if(return_invalid_chars == true && invalid_chars != '')
           {
           last_comma = invalid_chars.lastIndexOf(',');
           
           if(last_comma != -1)
              invalid_chars = invalid_chars.substr(0, $last_comma) + 
              ' and ' + invalid_chars.substr(last_comma + 1, invalid_chars.length);
                      
           return(invalid_chars);
           }
         else
           return(invalid_chars == ''); 
         }
		 
function Validate_Email_Address(email_address)
 {
	 //Assumes that valid email addresses consist of user_name@domain.tld
	 at = email_address.indexOf('@');
	 //dot = email_address.indexOf('.');
	 dot = email_address.lastIndexOf('.');
	 
	 if(at == -1 || 
		dot == -1 || 
		dot <= at + 1 ||
		dot == 0 || 
		dot == email_address.length - 1)
		return(false);
		
	 user_name = email_address.substr(0, at);
	 domain_name = email_address.substr(at + 1, email_address.length);                  
	 
	 if(Validate_String(user_name) === false || Validate_String(domain_name) === false)
	 {
		 return(false);                     
	 }	 
	 return(true);
 }