// Copyright 2006-2007 javascript-array.com

var timeout	= 20;
var closetimer	= 0;
var ddmenuitem	= 0;

function getInternetExplorerVersion()
// Returns the version of Internet Explorer or a -1
// (indicating the use of another browser).
{
  var rv = -1; // Return value assumes failure.
  if (navigator.appName == 'Microsoft Internet Explorer')
  {
    var ua = navigator.userAgent;
    var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
    if (re.exec(ua) != null)
      rv = parseFloat( RegExp.$1 );
  }
  return rv;
}



// open hidden layer
function mopen(id,others,ie6,ie8)
{	
	var isIE=getInternetExplorerVersion();
	
	// cancel close timer
	mcancelclosetime();

	// close old layer
	if(ddmenuitem) ddmenuitem.style.display = 'none';

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	if(isIE==-1){
		
		ddmenuitem.style.marginLeft = others + "px";	
	
	}else{
		if(isIE==7){
			
			ddmenuitem.style.marginLeft = ie6 + "px";			
		
		}
		if(isIE==8){
			ddmenuitem.style.marginLeft = ie8 + "px";;				
		}
	}
	

	ddmenuitem.style.display = 'block';

}
// close showed layer
function mclose()
{
	if(ddmenuitem) ddmenuitem.style.display = 'none';
}

// 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;