function showBlok( mItem )
{
	if (document.getElementById(mItem).style.display == 'none') {
		document.getElementById(mItem).style.display = ''; 
	} else {
		document.getElementById(mItem).style.display = 'none'; 
	}
}

function changeHeightMenu(obj){
var cells, cell, item, div;
cells = document.getElementById("heightmenu").rows[0].cells;
for (i=0; i < cells.length; i++)  {
          cell = cells[i];
          div = document.getElementById("tab"+i);
          item = document.getElementById("item"+i);
          if (obj.getAttribute("num") == i){
             item.removeAttribute("href");
             item.removeAttribute("class");
             cell.className = "active";
             div.style.display = "block";
             div.style.visibility = "visible";
          }
          else {
             item.setAttribute("href", "javascript:changeHeightMenu(this);");
             cell.className = "tab";
             div.style.display = "none";
             div.style.visibility = "hidden";
          }
 }
}