//image preloader
function MM_preloadImages() { //v3.0
 var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
   var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
   if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

//preload the generic buttons
function preload_nav_btns(){
	MM_preloadImages('/images/leftnav_home_f2.gif','/images/leftnav_collections_f2.gif','/images/leftnav_exhibitions_f2.gif','/images/leftnav_education_f2.gif','/images/leftnav_whatson_f2.gif','/images/leftnav_planyourvisit_f2.gif','/images/leftnav_getinvolved_f2.gif','/images/leftnav_aboutus_f2.gif','/images/leftnav_faqs_f2.gif','/images/leftnav_contact_f2.gif','/images/leftnav_usefullinks_f2.gif','/images/leftnav_rightcollinks_f2.gif','/images/leftnav_bullet_f2.gif','/images/leftnav_arrow_f2.gif','/images/btn_readmore_f2.gif','/images/btn_searchcollections_f2.gif');
}

function back_button(){
	document.write('<p><small><span class="arrow_link">&laquo;&nbsp;<a href="javascript:history.back(-1)" title="Back">Back</a></span></small></p>');
}