function viewPic(img)
{
    picfile = new Image();
    picfile.src =(img);
    fileCheck(img);

    
}

function fileCheck(img)
{
    if( (picfile.width!=0) && (picfile.height!=0) )
    {
        makeWindow(img);
    }
    else
    {
        funzione="fileCheck('"+img+"')";
        intervallo=setTimeout(funzione,10);
    }
}
function makeWindow(img)
{
    ht = picfile.height + 30;
    wd = picfile.width + 20;

    var args= "height=" + ht + ",innerHeight=" + ht;
    args += ",width=" + wd + ",innerWidth=" + wd;
    if (window.screen)
    {
        var avht = screen.availHeight;
        var avwd = screen.availWidth;
        var xcen = (avwd - wd) / 2;
        var ycen = (avht - ht) / 2;
        args += ",left=" + xcen + ",screenX=" + xcen;
        args += ",top=" + ycen + ",screenY=" + ycen + ",resizable=yes";
    }
    return etWin=window.open(img, '', args);
    
    
    
}