// JavaScript Document

   function prev(cat, next, max) {
      var AgntUsr=navigator.userAgent.toLowerCase();
      var ExpYes=AgntUsr.indexOf('msie')!=-1?1:0;

      var pre_val = new Array();
      (ExpYes!=1) ? pre_val = next.split('_') : pre_val = next.split('_');

      var pas_val = new Array();
      (ExpYes!=1) ? new_next = pre_val[2].split('.jpg') : new_next = pre_val[2].split('.jpg');

      if (--new_next[0] > 0) {
         document.getElementById("main_1").src = "gallery/" + cat + "/" + cat + "_event_"+ new_next[0] +".jpg";
      } else {
         document.getElementById("main_1").src = "gallery/" + cat + "/" + cat + "_event_"+ max +".jpg";
      } // end if
   } // end function

   function next(cat, next, max) {
      var AgntUsr=navigator.userAgent.toLowerCase();
      var ExpYes=AgntUsr.indexOf('msie')!=-1?1:0;

      var pre_val = new Array();
      pre_val = next.split('_');

      var pas_val = new Array();
		new_next = pre_val[2].split('.jpg');

      if (++new_next[0] < max) {
         document.getElementById("main_1").src = "gallery/" + cat + "/" + cat + "_event_"+ new_next[0] +".jpg";
      } else {
         document.getElementById("main_1").src = "gallery/" + cat + "/" + cat + "_event_1.jpg";
      } // end if
   } // end function