takes a start year and end year, returns an array of years that have four different numbers. http://imgur.com/gallery/rDJjm

any number

(function(start, max) {
    results = [];
    for(i = start;i <= max; i++) {
        var year = String(i);

        var f = "0123456789"
        .split("")
        .filter(function(n) {
        return year.indexOf(n) != -1
        });
        if(year.length === f.length) 
          results.push(year);
        }
        return results;
})(10,99999);

gistfile1.txt

(function(start, max) {
   results = [];
   for(i = start;i <= max; i++) {
   var year = String(i);
    if(year.length == 4) {
        var f = "0123456789"
        .split("")
        .filter(function(n) {
           return year.indexOf(n) != -1
        });
        
        if(f.length == 4) {
            results.push(year);
        }
    }
   }
   return results;
})(1900,2040);