function change_menu(object){
 if(object == 'menu_1A'){
  document.getElementById('l1').src='design/menu_l_a.gif'
  document.getElementById('bg1').className='menu_a'
  document.getElementById('r1').src='design/menu_r_a.gif'
 }

 if(object == 'menu_1'){
  document.getElementById('l1').src='design/menu_l.gif'
  document.getElementById('bg1').className='menu'
  document.getElementById('r1').src='design/menu_r.gif'
 }

 if(object == 'menu_2A'){
  document.getElementById('l2').src='design/menu_l_a.gif'
  document.getElementById('bg2').className='menu_a'
  document.getElementById('r2').src='design/menu_r_a.gif'
 }

 if(object == 'menu_2'){
  document.getElementById('l2').src='design/menu_l.gif'
  document.getElementById('bg2').className='menu'
  document.getElementById('r2').src='design/menu_r.gif'
 }

 if(object == 'menu_3A'){
  document.getElementById('l3').src='design/menu_l_a.gif'
  document.getElementById('bg3').className='menu_a'
  document.getElementById('r3').src='design/menu_r_a.gif'
 }

 if(object == 'menu_3'){
  document.getElementById('l3').src='design/menu_l.gif'
  document.getElementById('bg3').className='menu'
  document.getElementById('r3').src='design/menu_r.gif'
 }

 if(object == 'menu_4A'){
  document.getElementById('l4').src='design/menu_l_a.gif'
  document.getElementById('bg4').className='menu_a'
  document.getElementById('r4').src='design/menu_r_a.gif'
 }

 if(object == 'menu_4'){
  document.getElementById('l4').src='design/menu_l.gif'
  document.getElementById('bg4').className='menu'
  document.getElementById('r4').src='design/menu_r.gif'
 }

 if(object == 'menu_5A'){
  document.getElementById('l5').src='design/menu_l_a.gif'
  document.getElementById('bg5').className='menu_a'
  document.getElementById('r5').src='design/menu_r_a.gif'
 }

 if(object == 'menu_5'){
  document.getElementById('l5').src='design/menu_l.gif'
  document.getElementById('bg5').className='menu'
  document.getElementById('r5').src='design/menu_r.gif'
 }

 if(object == 'menu_6A'){
  document.getElementById('l6').src='design/menu_l_a.gif'
  document.getElementById('bg6').className='menu_a'
  document.getElementById('r6').src='design/menu_r_a.gif'
 }

 if(object == 'menu_6'){
  document.getElementById('l6').src='design/menu_l.gif'
  document.getElementById('bg6').className='menu'
  document.getElementById('r6').src='design/menu_r.gif'
 }

}
var imgFile = new Array()

imgFile[1] = "design/menu_l_a.gif"
imgFile[2] = "design/menu_r_a.gif"
imgFile[3] = "design/menu_bg_a.gif"

var imgObj = new Array()
for(i = 0; i < imgFile.length; i++){
 imgObj[i] = new Image(20, 7)
 imgObj[i].src = imgFile[i]
}