function change_picture(id)
{

    for (i = 0; i < cats.length; i++) {
    	e = 'pc' + cats[i];
        elem =  document.getElementById(e);
        if (elem.style.display == '') {
            elem.style.display = 'none';

        }
        if (e == 'p' + id)  {
            elem.style.display = '';
        }
    }
}

function select_products(id) {
    elem = document.getElementById("p_frame");
    elem.src = "index.php?action=products_view&category_id=" + id.substring(1);
}

w = screen.width;
h = screen.height;
x = w/2-200;
y = h/2-150;
function open_popup(theURL,winName)
{
    window.open(theURL,winName,'status=no,resizable=no,scrollbars=no,toolbar=no,location=no,directories=no,menubar=no,width=400,height=560,top='+y+',left='+x+',screenX='+x+',screenY='+y);
}