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

  mn_strba_on = new Image;
  mn_strba_on.src = 'fileadmin/templates/img/mn_strba_on.gif';
  mn_strba_off = new Image;
  mn_strba_off.src = 'fileadmin/templates/img/mn_strba_off.gif';

  mn_rec_on = new Image;
  mn_rec_on.src = 'fileadmin/templates/img/mn_rec_on.gif';
  mn_rec_off = new Image;
  mn_rec_off.src = 'fileadmin/templates/img/mn_rec_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;
  }
}