if (document.images) {
img00on=new Image(); img00on.src="img/m_00_on.gif";  img00off=new Image(); img00off.src="img/m_00.gif";
img01on=new Image(); img01on.src="img/m_01_on.gif";  img01off=new Image(); img01off.src="img/m_01.gif";
img02on=new Image(); img02on.src="img/m_02_on.gif";  img02off=new Image(); img02off.src="img/m_02.gif";
img03on=new Image(); img03on.src="img/m_03_on.gif";  img03off=new Image(); img03off.src="img/m_03.gif";
img04on=new Image(); img04on.src="img/m_04_on.gif";  img04off=new Image(); img04off.src="img/m_04.gif";
img05on=new Image(); img05on.src="img/m_05_on.gif";  img05off=new Image(); img05off.src="img/m_05.gif";
img06on=new Image(); img06on.src="img/m_06_on.gif";  img06off=new Image(); img06off.src="img/m_06.gif";
img07on=new Image(); img07on.src="img/m_07_on.gif";  img07off=new Image(); img07off.src="img/m_07.gif";
img08on=new Image(); img08on.src="img/m_08_on.gif";  img08off=new Image(); img08off.src="img/m_08.gif";
img09on=new Image(); img09on.src="img/m_09_on.gif";  img09off=new Image(); img09off.src="img/m_09.gif";
img10on=new Image(); img10on.src="img/m_10_on.gif";  img10off=new Image(); img10off.src="img/m_10.gif";
img11on=new Image(); img11on.src="img/m_11_on.gif";  img11off=new Image(); img11off.src="img/m_11.gif";
img12on=new Image(); img12on.src="img/m_12_on.gif";  img12off=new Image(); img12off.src="img/m_12.gif";
}
  function imgOn(imgName) {
if (document.images) {
document[imgName].src=eval (imgName+"on.src")
}
}
  function imgOff (imgName) {
if (document.images) {
document[imgName].src=eval(imgName+"off.src");
}
}