nav_storieson= new Image();
nav_storieson.src="images/nav_storiesR.gif";
nav_storiesoff= new Image();
nav_storiesoff.src="images/nav_stories.gif";
nav_archiveon= new Image();
nav_archiveon.src="images/nav_archiveR.gif";
nav_archiveoff= new Image();
nav_archiveoff.src="images/nav_archive.gif";
nav_abouton= new Image();
nav_abouton.src="images/nav_aboutR.gif";
nav_aboutoff= new Image();
nav_aboutoff.src="images/nav_about.gif";
nav_contactson= new Image();
nav_contactson.src="images/nav_contactsR.gif";
nav_contactsoff= new Image();
nav_contactsoff.src="images/nav_contacts.gif";
nav_tearsheetson= new Image();
nav_tearsheetson.src="images/nav_tearsheetsR.gif";
nav_tearsheetsoff= new Image();
nav_tearsheetsoff.src="images/nav_tearsheets.gif";
function img_act(imgName,PicName)
   {
    document [PicName].src = eval(imgName + ".src");
   }