//navbar for top level webpages
 function topon3() 
{     document.top3.src="graphics/buttons/topmarbred.gif"  }
 function topoff3()
{     document.top3.src="graphics/buttons/topmarb.gif" }
function backon3() 
{     document.back3.src="graphics/buttons/backmarbred.gif"  }
 function backoff3()
{     document.back3.src="graphics/buttons/backmarb.gif"  }
function homeon3() 
{     document.home3.src="graphics/buttons/homemarbred.gif"  }
 function homeoff3()
{     document.home3.src="graphics/buttons/homemarb.gif"  }
function nexton3() 
{     document.next3.src="graphics/buttons/nextmarbred.gif"  }
 function nextoff3()
{     document.next3.src="graphics/buttons/nextmarb.gif"  }
function emailon3() 
{     document.email3.src="graphics/buttons/emailmarbred.gif"  }
 function emailoff3()
{     document.email3.src="graphics/buttons/emailmarb.gif"  }
function reloadon3() 
{     document.reload3.src="graphics/buttons/reloadmarbred.gif"  }
 function reloadoff3()
{     document.reload3.src="graphics/buttons/reloadmarb.gif"  }
function reloaddown3()
{     document.reload3.src="graphics/buttons/reloadmarbgrn.gif"  }