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 getPageSize(){
	var xScroll, yScroll;
	if (window.innerHeight && window.scrollMaxY) {
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}

	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}

	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else {
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}
	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
	return arrayPageSize;
}
function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	//arrayPageScroll = new Array('',yScroll)
	//return arrayPageScroll;
	return yScroll
}
function CheckUIElements()
{
	var yMenuFrom, yMenuTo, yButtonFrom, yButtonTo, yOffset, timeoutNextCheck;
	yMenuFrom   = parseInt ( document.getElementById('divMenu').style.top, 10);
	yMenuTo     = getPageScroll() + 20; //
	if ( yMenuFrom != yMenuTo ) {
		yOffset = Math.ceil( Math.abs( yMenuTo - yMenuFrom ) / 20 );
		if ( yMenuTo < yMenuFrom )
			yOffset = -yOffset;
		//alert(parseInt(document.getElementById('divMenu').style.top));
		document.getElementById('divMenu').style.top = (parseInt (document.getElementById('divMenu').style.top, 10) + yOffset)+'px';

		timeoutNextCheck = 10;
	}

	setTimeout ("CheckUIElements()", timeoutNextCheck);
}

window.onload=function(){
	document.getElementById('divMenu').style.top = getPageScroll() + 10;
	document.getElementById('divMenu').style.visibility = "visible";
	CheckUIElements();
	return true;
}