function popUp(desktopURL,ancho,alto,resizeable,scrollbars,target){
    x = parseInt(window.screen.width) / 2 - ancho / 2;
    y = parseInt(window.screen.height) / 2 - alto / 2;
    var desktop = window.open(desktopURL,target, "width="+ancho+",height="+alto+",scrollbars="+scrollbars+",resizable="+resizeable+"");
    desktop.moveTo(x,y);
}
function permutImage(flag,img){
    if (document.images){
        if (document.images[img].permloaded){
            if (flag==1){
                document.images[img].src = document.images[img].perm.src;
            }else{
                document.images[img].src = document.images[img].perm.oldsrc;
            }
        }
    }
}
function preLoadPermut(img,adresse){
    if (document.images){
        img.onload = null;
        img.perm = new Image();
        img.perm.oldsrc = img.src;
        img.perm.src = adresse;
        img.permloaded = true;
    }
}
function askYesNo(url,msg){
    if (confirm(msg)){
        location.href=url;
    }
}