/* menu */
NAV_TIMEOUT = 3000; // ms

navTimer = null;
curBlock = "";

function showBlock(block){
       
    // check if a layer is display:inline
    if (curBlock != "" && curBlock != block) {
        hideBlock(curBlock);
    }
    
    curBlock = block;

    block = document.getElementById(block);
    block.style.display = "inline";
    
    clearTimeout(navTimer);
}

function timeoutBlock(block) {
    thisBlock = block;
    navTimer = setTimeout('hideBlock(thisBlock)', NAV_TIMEOUT);
}

function hideBlock(block) {
    block = document.getElementById(block);
    block.style.display = "none";
}// JavaScript Document