function createtable(links,tblname, alignment) {
    // creo una lista de ids casuales entre 0 y links.length.
    links.sort(function(a,b){return Math.round(Math.random())*-1})
    var tb = document.getElementById(tblname).tBodies[0];
    for (i = 0; i< links.length; i++) {
        var row = document.createElement('tr');
        var cell = document.createElement('td');
        cell.setAttribute('align',alignment);
        var link = document.createElement('a');
        // add the link url
        link.setAttribute('href', links[i][0]);
        link.setAttribute('border', '0');
        link.setAttribute('target', '_blank');
        var img = document.createElement('img');
        img.setAttribute('alt', links[i][1][1]);
        img.setAttribute('src', links[i][1][0]);
        img.setAttribute('border', '0');
        img.setAttribute('style', 'padding: 0 10px');
        link.appendChild(img);
        cell.appendChild(link);
        
        row.appendChild(cell);
        tb.appendChild(row);
    }
}