var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

if (checkIt('konqueror'))
{
	browser = "Konqueror";
	OS = "Linux";
}
else if (checkIt('safari')) browser = "Safari"
else if (checkIt('omniweb')) browser = "OmniWeb"
else if (checkIt('opera')) browser = "Opera"
else if (checkIt('webtv')) browser = "WebTV";
else if (checkIt('icab')) browser = "iCab"
else if (checkIt('msie')) browser = "Internet Explorer"
else if (!checkIt('compatible'))
{
	browser = "Netscape Navigator"
	version = detect.charAt(8);
}
else browser = "An unknown browser";

if (!version) version = detect.charAt(place + thestring.length);

if (!OS)
{
	if (checkIt('linux')) OS = "Linux";
	else if (checkIt('x11')) OS = "Unix";
	else if (checkIt('mac')) OS = "Mac"
	else if (checkIt('win')) OS = "Windows"
	else OS = "an unknown operating system";
}

function checkIt(string)
{
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}

function openWindow(ow_str_url, ow_int_width, ow_int_height, ow_int_locationOn) {
	empty_var = window.open(ow_str_url, 'external', "WIDTH=" + ow_int_width + ",HEIGHT=" + ow_int_height + ",directories=0,location=" + ow_int_locationOn + ",menubar=0,resizable=1,scrollbars=1,toolbar=0");
}

function closeWindow() {
	empty_var = self.close();
}

function matchLayerHeights() {
	var elm = document.getElementById('trans_bg_main');
	elm.style.height = 'auto';
	var x = elm.offsetHeight;
	var elm_vert_bar = document.getElementById('trans_bg_vertical');
	//var y = elm_vert_bar.offsetHeight;
	
//alert("main height = " + x);
//alert("vert bar height = " + y);	
	
	if (browser == 'Internet Explorer') {
		pixelHeight = (x + 185)  + "px";
	}
	else {
		pixelHeight = (x - 5)  + "px";
	}
	
	elm_vert_bar.style.height = pixelHeight;
	//elm.style.height = pixelHeight;			
}

window.onresize = matchLayerHeights;

function openLayer(lyrId) {
	var fullLayer ;
		
	if (document.getElementById) {
		//alert("dom") ;
		fullLayer = document.getElementById(lyrId) ;
	} else if (document.all) {
		//alert("older ie") ;
		fullLayer = document.all[lyrId].style ;
	} else if (document.layers) {
		//alert("older ns") ;
		fullLayer = document.layers[lyrId] ;
	}
			
	fullLayer.style.visibility = "visible";
}

function closeLayer(lyrId) {
	var fullLayer ;
			
	if (document.getElementById) {
		//alert("dom") ;
		fullLayer = document.getElementById(lyrId) ;
	} else if (document.all) {
		//alert("older ie") ;
		fullLayer = document.all[lyrId].style ;
	} else if (document.layers) {
		//alert("older ns") ;
		fullLayer = document.layers[lyrId] ;
	}

	fullLayer.style.visibility = "hidden" ;
}