// When the page loads:
window.onload = function(){
  if (document.getElementsByTagName) {
    // Get all the tags of type object in the page.
      var objs = document.getElementsByTagName("object");
      for (i=0; i<objs.length; i++) {
        // Get the HTML content of each object tag
        // and replace it with itself.
        objs[i].outerHTML = objs[i].outerHTML;
	  }
   }
}
// When the page unloads:
window.onunload = function() {
  if (document.getElementsByTagName) {
    //Get all the tags of type object in the page.
    var objs = document.getElementsByTagName("object");
    for (i=0; i<objs.length; i++) {
      // Clear out the HTML content of each object tag
      // to prevent an IE memory leak issue.
      objs[i].outerHTML = "";
    }
  }
}

// Functions for opening and closing pop-up windows
function showPopup(link) {
	var popup = document.getElementById("popup");
		popup.style.display = '';
		popup.innerHTML = '<img src="' + link + '" onclick=closePopup();>';
}
function closePopup() {
	var popup = document.getElementById("popup");
		popup.style.display = 'none';
}