function overr (table) {
    var cells = table.getElementsByTagName("td");   
    cells[0].style.background = cells[0].style.background.replace(/L\.jpg/g,'LH.jpg');
    cells[1].style.background = cells[1].style.background.replace(/C\.jpg/g,'CH.jpg');
    cells[2].style.background = cells[2].style.background.replace(/R\.jpg/g,'RH.jpg');
 }
 function outt(table) {
    var cells = table.getElementsByTagName("td"); 
    cells[0].style.background = cells[0].style.background.replace(/LH\.jpg/g,'L.jpg');  
    cells[1].style.background = cells[1].style.background.replace(/CH\.jpg/g,'C.jpg');
    cells[2].style.background = cells[2].style.background.replace(/RH\.jpg/g,'R.jpg');
 }