var imageFiles_y_4 = new Array();
imageFiles_y_4['0'] = new Array ('_images/y_HOME.gif', '_images/y_HOMEMouseover.gif');
imageFiles_y_4['1'] = new Array ('_images/y_24hr_TURNAROUND.gif', '_images/y_24hr_TURNAROUNDMouseover.gif');
imageFiles_y_4['2'] = new Array ('_images/y_VA_SERVICES.gif', '_images/y_VA_SERVICESMouseover.gif');
imageFiles_y_4['3'] = new Array ('_images/y_TESTIMONIALS.gif', '_images/y_TESTIMONIALSMouseover.gif');
imageFiles_y_4['4'] = new Array ('_images/y_REQUEST_FORM.gif', '_images/y_REQUEST_FORMMouseover.gif');
imageFiles_y_4['5'] = new Array ('_images/y_SPEAKING_TOPICS.gif', '_images/y_SPEAKING_TOPICSMouseover.gif');
imageFiles_y_4['6'] = new Array ('_images/y_BIO.gif', '_images/y_BIOMouseover.gif');

function image_on_y_4 (position) {
   var doc = eval("document.imagey_4" + position);
   doc.src = imageFiles_y_4[position][1];
}

function image_off_y_4 (position) {
   var doc = eval("document.imagey_4" + position);
   doc.src = imageFiles_y_4[position][0];
}