<!--

if (document.images)
{
//declare header buttons
loginover = new Image
loginup = new Image
logoutover = new Image
logoutup = new Image
emailover = new Image
emailup = new Image

//declare other buttons
editannounceover = new Image
editannounceup = new Image
addannounceover = new Image
addannounceup = new Image
viewhwup = new Image
viewhwover = new Image
classevup = new Image
classevover = new Image
gradedevup = new Image
gradedevover = new Image
assignmgrup = new Image
assignmgrover = new Image
personalevup = new Image
personalevover = new Image
semestergradesup = new Image
semestergradesover = new Image
dailygradesup = new Image
dailygradesover = new Image
absencelistup = new Image
absencelistover = new Image
attendup = new Image
attendover = new Image
courseevup = new Image
courseevover = new Image
addcourseevup = new Image
addcourseevover = new Image
viewcourseevup = new Image
viewcourseevover = new Image
classportfolioup = new Image
classportfolioover = new Image

//define header buttons
loginup.src="/dashboard/images/header/login.gif"
loginover.src="/dashboard/images/header/login_over.gif"
logoutup.src="/dashboard/images/header/logout.gif"
logoutover.src="/dashboard/images/header/logout_over.gif"
emailup.src="/dashboard/images/header/email.gif"
emailover.src="/dashboard/images/header/email_over.gif"

//define other buttons
editannounceup.src="/dashboard/images/button_editannounce.gif"
editannounceover.src="/dashboard/images/button_editannounce_over.gif"
addannounceup.src="/dashboard/images/button_addannounce.gif"
addannounceover.src="/dashboard/images/button_addannounce_over.gif"
viewhwup.src="/dashboard/images/button_viewhw.gif"
viewhwover.src="/dashboard/images/button_viewhw_over.gif"
classevup.src="/dashboard/images/button_classev.gif"
classevover.src="/dashboard/images/button_classev_over.gif"
gradedevup.src="/dashboard/images/button_gradedev.gif"
gradedevover.src="/dashboard/images/button_gradedev_over.gif"
assignmgrup.src="/dashboard/images/button_assignmgr.gif"
assignmgrover.src="/dashboard/images/button_assignmgr_over.gif"
personalevup.src="/dashboard/images/button_personalev.gif"
personalevover.src="/dashboard/images/button_personalev_over.gif"
semestergradesup.src="/dashboard/images/button_semestergrades.gif"
semestergradesover.src="/dashboard/images/button_semestergrades_over.gif"
dailygradesup.src="/dashboard/images/button_dailygrades.gif"
dailygradesover.src="/dashboard/images/button_dailygrades_over.gif"
absencelistup.src="/dashboard/images/button_absencelist.gif"
absencelistover.src="/dashboard/images/button_absencelist_over.gif"
attendup.src="/dashboard/images/button_attend.gif"
attendover.src="/dashboard/images/button_attend_over.gif"
courseevup.src="/dashboard/images/button_courseev.gif"
courseevover.src="/dashboard/images/button_courseev_over.gif"
addcourseevup.src="/dashboard/images/button_addcourseev.gif"
addcourseevover.src="/dashboard/images/button_addcourseev_over.gif"
viewcourseevup.src="/dashboard/images/button_viewcourseev.gif"
viewcourseevover.src="/dashboard/images/button_viewcourseev_over.gif"
classportfolioup.src="/dashboard/images/button_classportfolio.gif"
classportfolioover.src="/dashboard/images/button_classportfolio_over.gif"
}

else
{
//set header buttons to null for old browsers
loginover.src=""
loginover.src=""
document.login=""
logoutover.src=""
logoutover.src=""
document.logout=""
emailover.src=""
emailover.src=""
document.email=""

//set other buttons to null for old browsers
editannounceup.src=""
editannounceover.src=""
document.editannounce=""
addannounceup.src=""
addannounceover.src=""
document.addannounce=""
viewhwup.src=""
viewhwover.src=""
document.viewhw=""
classevup.src=""
classevover.src=""
document.classev=""
gradedevup.src=""
gradedevover.src=""
document.gradedev=""
assignmgrover.src=""
assignmgrover.src=""
document.assignmgr=""
personalevover.src=""
personalevover.src=""
courseevup.src=""
courseevover.src=""
addcourseevup.src=""
addcourseevover.src=""
viewcourseevup.src=""
viewcourseevover.src=""
semestergradesup.src=""
semestergradesover.src=""
classportfolioup.src=""
classportfolioover.src=""
document.personalev=""
}

function ov(picname)
{
eval ('document.' + picname + '.src = ' + picname + 'over.src')
}
function ou(picname)
{
eval ('document.' + picname + '.src = ' + picname + 'up.src')
}


//-->