Validate string

JavaScript
1

Hi,
I really should validate a string like this
index/index/page/4/slug/myseoslug
from a hash (I’m using history jquery plugin)
#index/index/page/2/slug/secondo?&_suid=1341580203178011306333182273698


History.Adapter.bind(window,'load',function(){
        var hash = History.getHash();
        if(hash.length > 0){
           var tmp = validateHash(hash);
           if(typeof tmp === 'string'){
             log(tmp);
           }

        }

 });
 function validateHash(hash){
    var url = hash.split('?',2)[0];
    if(url.indexOf('index/index/page') !== -1){
        var chunks =  url.split('/',6);
        return chunks.slice(2, 6).join('/');
    }
    return false;
 }

Is there a better way ?
Thanks in advance.