var imageFiles_2x_31 = new Array();
imageFiles_2x_31['0'] = new Array ('_images/2x_Home.gif', '_images/2x_HomeMouseover.gif');
imageFiles_2x_31['1'] = new Array ('_images/2x_About_Us.gif', '_images/2x_About_UsMouseover.gif');
imageFiles_2x_31['2'] = new Array ('_images/2x_Membership.gif', '_images/2x_MembershipMouseover.gif');
imageFiles_2x_31['3'] = new Array ('_images/2x_Working_Groups.gif', '_images/2x_Working_GroupsMouseover.gif');
imageFiles_2x_31['4'] = new Array ('_images/2x_Contact_Us.gif', '_images/2x_Contact_UsMouseover.gif');
imageFiles_2x_31['5'] = new Array ('_images/2x_Public_Links.gif', '_images/2x_Public_LinksMouseover.gif');
imageFiles_2x_31['6'] = new Array ('_images/2x_Job_Opportunities.gif', '_images/2x_Job_OpportunitiesMouseover.gif');
imageFiles_2x_31['7'] = new Array ('_images/2x_Events.gif', '_images/2x_EventsMouseover.gif');
imageFiles_2x_31['8'] = new Array ('_images/2x_H1N1__Swine_Flu_.gif', '_images/2x_H1N1__Swine_Flu_Mouseover.gif');
imageFiles_2x_31['9'] = new Array ('_images/2x_Members_Only.gif', '_images/2x_Members_OnlyMouseover.gif');

function image_on_2x_31 (position) {
   var doc = eval("document.image2x_31" + position);
   doc.src = imageFiles_2x_31[position][1];
}

function image_off_2x_31 (position) {
   var doc = eval("document.image2x_31" + position);
   doc.src = imageFiles_2x_31[position][0];
}