if(document.images) 
{    
  mn_01_on = new Image;
  mn_01_on.src = 'fileadmin/templates/img/mn_01_on.gif';
  mn_01_off = new Image;
  mn_01_off.src = 'fileadmin/templates/img/mn_01_off.gif';     

  mn_02_on = new Image;
  mn_02_on.src = 'fileadmin/templates/img/mn_02_on.gif';
  mn_02_off = new Image;
  mn_02_off.src = 'fileadmin/templates/img/mn_02_off.gif';     

  mn_03_on = new Image;
  mn_03_on.src = 'fileadmin/templates/img/mn_03_on.gif';
  mn_03_off = new Image;
  mn_03_off.src = 'fileadmin/templates/img/mn_03_off.gif';     

  mn_04_on = new Image;
  mn_04_on.src = 'fileadmin/templates/img/mn_04_on.gif';
  mn_04_off = new Image;
  mn_04_off.src = 'fileadmin/templates/img/mn_04_off.gif';     

  mn_05_on = new Image;
  mn_05_on.src = 'fileadmin/templates/img/mn_05_on.gif';
  mn_05_off = new Image;
  mn_05_off.src = 'fileadmin/templates/img/mn_05_off.gif';     

  mn_06_on = new Image;
  mn_06_on.src = 'fileadmin/templates/img/mn_06_on.gif';
  mn_06_off = new Image;
  mn_06_off.src = 'fileadmin/templates/img/mn_06_off.gif';     

  mn_07_on = new Image;
  mn_07_on.src = 'fileadmin/templates/img/mn_07_on.gif';
  mn_07_off = new Image;
  mn_07_off.src = 'fileadmin/templates/img/mn_07_off.gif';     

  mn_08_on = new Image;
  mn_08_on.src = 'fileadmin/templates/img/mn_08_on.gif';
  mn_08_off = new Image;
  mn_08_off.src = 'fileadmin/templates/img/mn_08_off.gif';     
}

function imgAct(img_name)
{
  if(document.images) {
    img_on = eval(img_name + '_on.src');      
	  document.getElementById(img_name).src = img_on;
  }
}

function imgInact(img_name)
{
  if(document.images) {
    img_off = eval(img_name + '_off.src');          
    document.getElementById(img_name).src = img_off;
  }
}