function resizeDiv() { 
    var content = document.getElementById('contentContainer').offsetHeight;
    var contentLeft=document.getElementById('contentLeft');
    if(content > 550){
        contentLeft.style.height = content+260+'px';
    }
    else{
        winH=document.documentElement.clientHeight;
        contentLeft.style.height = winH;
    } 
}

var timeout    = 500;
var closetimer    = 0;
var ddmenuitem    = 0;

// open hidden layer
function mopen(id)
{    
    // cancel close timer
    mcancelclosetime();

    // close old layer
    if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

    // get new layer and show it
    ddmenuitem = document.getElementById(id);
    ddmenuitem.style.visibility = 'visible';

}
// close showed layer
function mclose()
{
    if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}

// go close timer
function mclosetime()
{
    closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime()
{
    if(closetimer)
    {
        window.clearTimeout(closetimer);
        closetimer = null;
    }
}

// close layer when click-out
document.onclick = mclose;