function surveyrollon() {
  if (window.event.srcElement.className == "survey") 
  { window.event.srcElement.className = "surveyhighlight"; }
}
function surveyrolloff() {
  if (window.event.srcElement.className == "surveyhighlight") {
     window.event.srcElement.className = "survey";
  }
}

function databaserollon() {
  if (window.event.srcElement.className == "database") 
  { window.event.srcElement.className = "databasehighlight"; }
}
function databaserolloff() {
  if (window.event.srcElement.className == "databasehighlight") {
     window.event.srcElement.className = "database";
  }
}

function newslettersrollon() {
  if (window.event.srcElement.className == "newsletters") 
  { window.event.srcElement.className = "newslettershighlight"; }
}
function newslettersrolloff() {
  if (window.event.srcElement.className == "newslettershighlight") {
     window.event.srcElement.className = "newsletters";
  }
}


function sourcesrollon() {
  if (window.event.srcElement.className == "sources") 
  { window.event.srcElement.className = "sourceshighlight"; }
}
function sourcesrolloff() {
  if (window.event.srcElement.className == "sourceshighlight") {
     window.event.srcElement.className = "sources";
  }
}


function contactsrollon() {
  if (window.event.srcElement.className == "contacts") 
  { window.event.srcElement.className = "contactshighlight"; }
}
function contactsrolloff() {
  if (window.event.srcElement.className == "contactshighlight") {
     window.event.srcElement.className = "contacts";
  }
}


function linksrollon() {
  if (window.event.srcElement.className == "links") 
  { window.event.srcElement.className = "linkshighlight"; }
}
function linksrolloff() {
  if (window.event.srcElement.className == "linkshighlight") {
     window.event.srcElement.className = "links";
  }
}