function cover_style (nmb)  {

    icover = document.getElementById("divCover");   

	  icover_cont = document.getElementById("cover_cont"); 

	  icover_cont.style.display = "none";

	  if(nmb==3) {

	     icover.style.background = "url(images/cover"+nmb + ".gif)";

	  }

	  else {

	     icover.style.background = "url(images/cover"+nmb + ".jpg)";

	  }

}		



function makeInstance(url) {

    var httpRequest;



    if (window.XMLHttpRequest) { // Mozilla, Safari, ...

        httpRequest = new XMLHttpRequest();

        if (httpRequest.overrideMimeType) {

            httpRequest.overrideMimeType('text/xml');

        }

    } 

    else if (window.ActiveXObject) { // IE

        try {

            httpRequest = new ActiveXObject("Msxml2.XMLHTTP");

        } 

        catch (e) {

           try {

                httpRequest = new ActiveXObject("Microsoft.XMLHTTP");

           } 

          catch (e) {}

        }

    }



    if (!httpRequest) {

        alert('Giving up :( Cannot create an XMLHTTP instance');

        return false;

    }

    

    httpRequest.onreadystatechange = function() { handleResponse(httpRequest); };

    httpRequest.open('GET', url, true);

    httpRequest.send('');

}

    

function handleResponse(httpRequest) {

  if (httpRequest.readyState == 4) {

      if (httpRequest.status == 200) {

         icover_cont = document.getElementById("cover_cont"); 

         icover_cont.style.display = "block";

         icover_cont.style.background  = 'url(images/empty.jpg)';

      	 //document.getElementById('cover_cont').style.background = 'url(images/empty.jpg)';

         document.getElementById("divLoadArea").innerHTML = httpRequest.responseText;

      } else {

          alert('There was a problem with the request.');

      }

  }

}