var numbers="0123456789";
var chars=" abcdefghijklmnñopqrstuvwxyzáéíóú";
var money="'.,";
money=money+numbers;
var alphanum=numbers+chars;


function isthis(cadena,source)
{
var cadenaUp=cadena.toLowerCase();	
var ban=0;
for(i=0; i<=cadena.length; i++)
   {
   	
   ban=0;
   for (j=0; j<=source.length && ban!=1; j++)
       if (cadena.charAt(i)==source.charAt(j) || cadenaUp.charAt(i)==source.charAt(j))
           ban=1;
           
   if (ban==0)
     {
       return false;
   }
   }
   return true;
  
}