var panels = new Array('panel_features','panel_specifications','panel_warranty');
      var selectedTab = document.getElementById('tab_features');

      function showPanel(tab, name) {
        if (selectedTab) {
          selectedTab.className = "";
        }

        selectedTab = tab.parentNode;
		selectedTab.className = 'currentTab';


        for(i = 0; i < panels.length; i++) {
          document.getElementById(panels[i]).style.display = (name == panels[i]) ? 'block':'none';
        }
        return false;
      }