function showmenu(clss) {
   if (document.getElementById(clss).style.display == 'block') {
        document.getElementById(clss).style.display = 'none';
   }
   else {
        document.getElementById(clss).style.display = 'block';         
   }
 }
 
 function zvyraznit(clss) {
        /*document.getElementById(clss).style.backgroundColor = '#F4F9FF';*/
        document.getElementById(clss).style.backgroundImage="url(design/)";
        document.getElementById(clss).style.backgroundColor = '#555555';
        document.getElementById(clss).style.color = '#eeeeee';          
 } 
 
 function menustay(mlss) {
      
      if (mlss == "m1") {
        document.getElementById(mlss).src = 'design/menu_down_1x1.png';
        document.getElementById(mlss).onmouseover = 'design/menu_down_1x1.png';
        document.getElementById(mlss).onmouseout = 'design/menu_down_1x1.png';
      }
      if (mlss == "m2") {
        document.getElementById(mlss).src = 'design/menu_down_1x3.png';
        document.getElementById(mlss).onmouseover = 'design/menu_down_1x3.png';
        document.getElementById(mlss).onmouseout = 'design/menu_down_1x3.png';
      }
      if (mlss == "m3") {
        document.getElementById(mlss).src = 'design/menu_down_1x5.png';
        document.getElementById(mlss).onmouseover = 'design/menu_down_1x5.png';
        document.getElementById(mlss).onmouseout = 'design/menu_down_1x5.png';
      }
      if (mlss == "m4") {
        document.getElementById(mlss).src = 'design/menu_down_1x7.png';
        document.getElementById(mlss).onmouseover = 'design/menu_down_1x7.png';
        document.getElementById(mlss).onmouseout = 'design/menu_down_1x7.png';
      }
      if (mlss == "m5") {
        document.getElementById(mlss).src = 'design/menu_down_1x9.png';
        document.getElementById(mlss).onmouseover = 'design/menu_down_1x9.png';
        document.getElementById(mlss).onmouseout = 'design/menu_down_1x9.png';
      }
      
      
        
 }