var Utilities = new Object();

Utilities.getRelativePath = function(url, baseUrl) {

    var path = [];

    var urlParts = url.split('/');
    var baseUrlParts = baseUrl.split('/');

    var i;
    
    for(i = 0; i < Math.min(urlParts.length, baseUrlParts.length); i++ )
        if( urlParts[i] != baseUrlParts[i] )
            break;
        
    for( j = i; j < baseUrlParts.length - 1; j++ )
        path.push('..');
        
    while( i < urlParts.length )
        path.push(urlParts[i++]);
        
    return path.join('/');    
}