function changeTab(cTab) { 
switch(cTab){
			
		case 'mod':
			s_change('mod');
			t_change('mod');
		break;
			
		case 'cod':
			s_change('cod');
			t_change('cod');
		break;
			
		case 'fea':
			s_change('fea');
			t_change('fea');
		break;
		
		default: 
			break;
	}

}

	function s_change(tab)
	{
	
		document.getElementById('tab_fea_d').style.display='none';
		document.getElementById('tab_cod_d').style.display='none';
		document.getElementById('tab_mod_d').style.display='none';
		document.getElementById('tab_'+tab+'_d').style.display="block";
	}
	function t_change(tab)
	{

		document.getElementById('tab_mod').className="";
		document.getElementById('tab_cod').className="";
		document.getElementById('tab_fea').className="";
	    document.getElementById('tab_'+tab).className="Current";
		}
		
function getAjax(){
  var ajax=false; 
  try { 
   ajax = new ActiveXObject("Msxml2.XMLHTTP"); 
  } catch (e) { 
   try { 
    ajax = new ActiveXObject("Microsoft.XMLHTTP"); 
   } catch (E) { 
    ajax = false; 
   } 
  }
  if (!ajax && typeof XMLHttpRequest!='undefined') { 
   ajax = new XMLHttpRequest(); 
      if (ajax.overrideMimeType) 
			 {
       ajax.overrideMimeType('text/xml');
	   }
  } 
  return ajax;
 }
 
 function showPrice(serverPage,objID){
  var objdiary = document.getElementById(objID);
  var serverPage=serverPage;
  var ajaxFri = getAjax();   
  ajaxFri.open("GET", serverPage, true); 
  ajaxFri.onreadystatechange = function() { 
   if (ajaxFri.readyState == 4 && ajaxFri.status == 200) { 
    var text = ajaxFri.responseText; 
    if(text!=0){
     objdiary.innerHTML=text;
    }
   } 
  } 
    ajaxFri.send(null); 
 }
 function showCart(){
	 window.location="https://www.paypal.com/cgi-bin/webscr?display=1&business=order%40cheap-laptop-batteries.net&cmd=_cart";
	 
	 }