function addqty(tbox) {
  el = document.getElementById(tbox);
  c = eval(el.value);
  c=c+1;
  el.value= c;
}
function redqty(tbox) {
  el = document.getElementById(tbox); 
  c = eval(el.value)
  if (el.value > 0) c=c-1;
  el.value= c; 
}

function showhide(id) {
   el=document.getElementById(id);
   el.style.display=(el.style.display == 'block')?'none':'block';
}

function hide(id) {
   el=document.getElementById(id);
   el.style.display='none';
}
 function addfav() {
        title2 = "Ponožky.cz - Ráj českých ponožek"; 
        url2 = "http://www.ponozky.cz";
	    if (window.sidebar) { window.sidebar.addPanel(title2, url2,"");} 
	    else if( window.external ) { window.external.AddFavorite( url2, title2); }
 }