if (document.images) {

  var dalindaOff = new Image(); // for the inactive image
  dalindaOff.src = "images/navDalindaOff.jpg";
  var dalindaOn = new Image(); // for the active image
  dalindaOn.src = "images/navDalindaOn.jpg";

  var mecOff = new Image(); // for the inactive image
  mecOff.src = "images/navMECOff.jpg";
  var mecOn = new Image(); // for the active image
  mecOn.src = "images/navMECOn.jpg";
    
  var rresOff = new Image(); // for the inactive image
  rresOff.src = "images/navRRESOff.jpg";
  var rresOn = new Image(); // for the active image
  rresOn.src = "images/navRRESOn.jpg";
    
  var cresOff = new Image(); // for the inactive image
  cresOff.src = "images/navCRESOff.jpg";
  var cresOn = new Image(); // for the active image
  cresOn.src = "images/navCRESOn.jpg";
  
  var nt_dalinda = new Image();
  var nt_mec = new Image();
  var nt_res = new Image();

  nt_dalinda.src = "images/navTitleLDOn.gif"
  nt_mec.src = "images/navTitleMECOn.gif"
  nt_res.src = "images/navTitleRESOn.gif"
  
  var restoreDalinda = new Image();
  var restoreMEC = new Image();
  var restoreRES = new Image();
  
  restoreDalinda.src = "images/navTitleLDOff.gif"
  restoreMEC.src = "images/navTitleMECOff.gif"
  restoreRES.src = "images/navTitleRESOff.gif"
  
}

function rollOff(imgName,nav_text_area,nav_text) {
 if (document.images) {
   	document[imgName].src = eval(imgName + "Off.src");
	document[nav_text_area].src=eval(nav_text+".src");
	
}
}	

function rollOn(imgName,nav_text_area,nav_text) {
 if (document.images){
	document[imgName].src = eval(imgName + "On.src");
	document[nav_text_area].src=eval(nav_text+".src");
	
}
}