x = 110;
y = 10;
function sv(obj, coord)
{
    pic = document.getElementById('sudokuim');
    pos = getPos(pic);
    
    obj = document.getElementById(obj);
    
    t = document.getElementById('txt1');
    t.innerHTML = 'cella: '+coord;

    //links
    for (i=0; i<10; i++) {
        link = document.getElementById('l'+i);
        link.href = link.href.replace(/(.+\&num\=)(.+)/, "$1"+coord+i);
        if (i>0) link.innerHTML = i;
    }

    obj.style.left = (pos[0]+20)+'px';
    obj.style.top = (pos[1]+20)+'px';

	obj.style.visibility = (obj.style.visibility == 'visible') ? 'hidden' : 'visible';
}
function getPos(el) {
    // yay readability
    for (var lx=0, ly=0;
         el != null;
         lx += el.offsetLeft, ly += el.offsetTop, el = el.offsetParent);
    var ret = [];
    ret[0] = lx;
    ret[1] = ly;
    return ret;
}
function hide(obj, url) {
    obj = document.getElementById(obj);
    obj.style.visibility = 'hidden';
    window.location = url;
}