var bNetscape4plus = (navigator.appName == "Netscape" && navigator.appVersion.substring(0,1) >= "4");
var bExplorer4plus = (navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.substring(0,1) >= "4");

function CheckUIElements()
{
	var yMenuFrom, yMenuTo, yButtonFrom, yButtonTo, yOffset, timeoutNextCheck;

	if ( bNetscape4plus ) 
	{
		yMenuFrom   = document.getElementById("divMenu").top;
		yMenuTo     = top.pageYOffset + 200; 
	}
	else if ( bExplorer4plus )
	{
		yMenuFrom   = parseInt (divMenu.style.top, 0);
		yMenuTo     = document.body.scrollTop + 200;
	}
	
	timeoutNextCheck = 20;
	
	if ( Math.abs (yButtonFrom - (yMenuTo + 152)) < 6 && yButtonTo < yButtonFrom )
	{
		setTimeout ("CheckUIElements()", timeoutNextCheck);
		return;
	}

	if ( yMenuFrom != yMenuTo )
	{
		yOffset = Math.ceil( Math.abs( yMenuTo - yMenuFrom ) / 20 );
		if ( yMenuTo < yMenuFrom )
		yOffset = -yOffset;
		
		if ( bNetscape4plus )
		{
			divMenu.style.top += yOffset;
			
		}
		else if ( bExplorer4plus )
			divMenu.style.top = parseInt (divMenu.style.top, 0) + yOffset;
	
		timeoutNextCheck = 1;
	
	}
	
	if ( bNetscape4plus)
		setTimeout ("CheckUIElements()", timeoutNextCheck);
	else if ( bExplorer4plus)
		setTimeout ("CheckUIElements()", timeoutNextCheck);
}

function OnLoad()
{
	var y;
	if ( top.frames.length )
	{
		if ( bNetscape4plus )
		{
			divMenu.style.top = top.pageYOffset; 
			divMenu.style.visibility = "visible";
		}
		else if ( bExplorer4plus )
		{
			divMenu.style.top = document.body.scrollTop;
			divMenu.style.visibility = "visible";
		}
	}

	CheckUIElements();
	return true;
}


function MM_findObj(n, d) { 
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { 
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}
CheckUIElements();