function wopen(url, name, height, width, str1) {
    var str = "height=" + height + ",innerHeight=" + height;
    str += ",width=" + width + ",innerWidth=" + width;
	   
    str += ", "+str1;
	   
	   
    if (window.screen) {
        var ah = screen.availHeight - 30;
        var aw = screen.availWidth - 10;

        var xc = (aw - width) / 2;
        var yc = (ah - height) / 2;

        str += ",left=" + xc + ",screenX=" + xc;
        str += ",top=" + yc + ",screenY=" + yc;
    }
    var win=window.open(url, name, str);
    win.focus();
    return win;
}	 

function switch_img(name)
{
    document.all.image.innerHTML="<img src='./userdata/"+name+"'>";
}

function swap_image(image_ptr,name)
{
    image_ptr.src="./userdata/images/"+name;
}

function light_on(obj,color)
{
    obj.style.background=color;
    obj.style.cursor="hand";
}

function light_off(obj,color)
{
    obj.style.background=color;
    obj.style.cursor="";
}

function del_confirm (mylink, otherwise) /* confirm delete{{{*/
{
    if(confirm("Skutočne chcete vyprázdniť košík?"))
        return true;
	
    else
    {
        mylink.href=otherwise;
        return false;
    }
}/*}}}*/