var lastlink;

lastlink = "leeg";
if (checkJS()) { 
	if (document.images) { 

		enter_on = new Image(); enter_on.src = "images/enter_on.gif";
		enter_off = new Image(); enter_off.src = "images/enter.gif";
		
	}//if
}//if

function checkJS() {
	var browser_name, browser_version;

	browser_name = navigator.appName;
    browser_version = parseFloat(navigator.appVersion); 

    if (browser_name == "Netscape" && browser_version >= 3.0) {
      return true;
    } else {
	  if (browser_name == "Microsoft Internet Explorer" && browser_version >= 4.0) {
        return true;
      } else {
        return false;
      }
	}
}

function loadOver(imageName) {
  if (checkJS()) {
    document[imageName].src = eval(imageName + "_on.src"); 
  }//if
}//loadOver

function loadOut(imageName) {
  if (checkJS()) {
    document[imageName].src = eval(imageName + "_off.src"); 
  }//if
}//loadOut