/**
 * loads a page into a div
 * @param {string} the url you want to load
 * @param {string} the id of the div you wanto to populate
 */
function loadPage(url, divId) {

    if (window.XMLHttpRequest) { // Non-IE browsers
      req = new XMLHttpRequest();
      req.onreadystatechange = function() { targetDiv(divId) };
      try {
        req.open("GET", url, true);
      } catch (e) {
        alert(e);
      }
      req.send(null);
    } 
    else if (window.ActiveXObject) { // IE
      req = new ActiveXObject("Microsoft.XMLHTTP");
      if (req) {
        req.onreadystatechange = function() { targetDiv(divId) };
        req.open("GET", url, true);
        req.send();

      }
    }
	
}
/**
 * waits until the request is complete and makes sure and ok response was sent back
 * then populates the div with the html from the requested url 
 * @param {divId} the id of the div you wanto to populate
 */
function targetDiv(divId) {

    if (req.readyState == 4) { // Complete
          if (req.status == 200) { // OK response
              document.getElementById(divId).innerHTML = req.responseText;
			  var scriptTags = document.getElementById(divId).getElementsByTagName('script');
			  for(i=0; i < scriptTags.length; i++){
				eval(scriptTags[i].innerHTML);  
			  }
			  if(document.getElementById('image_ad') && document.getElementById('adunit_container')){
			  	document.getElementById('image_ad').innerHTML = document.getElementById('adunit_container').innerHTML;
			  }
			  return false;
          } else {
            alert("Error: " + req.statusText);
          }
    }      
}