var imageFiles_bg_13 = new Array();
imageFiles_bg_13['0'] = new Array ('_images/bg_Security_Services.gif', '_images/bg_Security_ServicesMouseover.gif');
imageFiles_bg_13['1'] = new Array ('_images/bg_News.gif', '_images/bg_NewsMouseover.gif');
imageFiles_bg_13['2'] = new Array ('_images/bg_Investigations.gif', '_images/bg_InvestigationsMouseover.gif');
imageFiles_bg_13['3'] = new Array ('_images/bg_Employment.gif', '_images/bg_EmploymentMouseover.gif');

function image_on_bg_13 (position) {
   var doc = eval("document.imagebg_13" + position);
   doc.src = imageFiles_bg_13[position][1];
}

function image_off_bg_13 (position) {
   var doc = eval("document.imagebg_13" + position);
   doc.src = imageFiles_bg_13[position][0];
}