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From 2014.igem.org

// Transition var switchMain = function ( target ) {

   current = $( "main>section.current" );
   current.slideUp();
   target.slideDown();
   current.removeClass( "current" );
   target.addClass( "current" );

};

var switchNav = function ( target ) {

   current = $( "nav>ul>li.current" );
   current.next().slideUp();
   target.next().slideDown();
   current.removeClass( "current" );
   target.addClass( "current" );

};

var switchSection = function ( sectionName ) {

   if ( $( "#" + sectionName ).is( $( "main>section.current" ) ) ) { return; }
   switchMain( $( "#" + sectionName ) );
   switchNav( $( "nav>ul>li." + sectionName ) );

};

var changeSection = function ( sectionName ) {

   if ( $( "#" + sectionName ).is( $( "main>section.current" ) ) ) { return; }
   switchMain( $( "#" + sectionName ) );
   switchNav( $( "nav>ul>li." + sectionName ) );
   window.history.pushState( { section: sectionName }, , sectionName );

};

$( "nav>ul>li" ).click(function () {

   sectionName = ;
   Names = [

"home", "project", "results", "modeling", "achieve", "practice", "team", "safety", "notebook"

   ];
   for (i in Names) {

if ( $( this ).hasClass( Names[i] ) ) { sectionName = Names[i]; }

   }

   changeSection( sectionName );
   return false;

});

window.onpopstate = function (event) {

 if (event && event.state) {
     switchSection( event.state.section );
 }

};

window.history.pushState( { section: "home"}, );