var junk = ( navigator.userAgent.indexOf('MSIE') != -1 && navigator.userAgent.indexOf('Mac') != -1 );
var gecko = ( navigator.userAgent.indexOf('Gecko') != -1 );
var isIE =  ( navigator.userAgent.indexOf('MSIE') != -1 );
var Safari = ( navigator.userAgent.indexOf('KHTML') != -1);
var eventHolder = new Object;
eventHolder['run'] = null;

 function createCookie(page) 
 {
  var ExpireDate = new Date ();
  var tmp = new Date();
  ExpireDate.setTime(ExpireDate.getTime() + 100000);
  var curCookie = "page=" + page + "; expires=" + ExpireDate.toGMTString() + "; path=/";
  document.cookie = curCookie;
}


function getProductNav (category, page) 
{
   
    if ( window.ActiveXObject ) // if it's ie
    {
       xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); // xmlhttp is global
       xmlhttp.onreadystatechange = function ()
       {	
          if(xmlhttp.readyState == 4) writecontent(xmlhttp.responseText);
       };
    }
    else 
    {
       if (window.XMLHttpRequest) // if it's firefox etc.
       {
         xmlhttp        = new XMLHttpRequest() // xmlhttp is global
         xmlhttp.onload = function () { writecontent(xmlhttp.responseText) };
       }
       else return; // 
    }
	      
            createCookie(page + '-' + category);
	        var url = "http://" + document.location.hostname + "/get_product_nav.php?page=" + page + "&cat=" + category;
            xmlhttp.open("GET", url , true); 
            xmlhttp.send(null);
		  
	
}

function writecontent (content)
{
     var targ = document.getElementById('product_nav'); 
	 if(targ && !content.match(/.error./))
	 { 
      document.getElementById('product_nav').innerHTML = content;
     }
}