var bAgentNetscape4 = (navigator.appName == "Netscape" && navigator.appVersion.substring(0,1) >= "4");
var bAgentExplorer4 = (navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.substring(0,1) >= "4");

function SetMenuPosition(leftPixel) {
	if (bAgentNetscape4) {
		document.layers.layerMenu.left=leftPixel; 
	}
	else if (bAgentExplorer4) {
		document.all("spanMenu").style.left=leftPixel; 
	}
	return true;
}

function PositionMenu() {
	if (bAgentNetscape4) { 
		document.layers.layerMenu.top = top.pageYOffset; 
	}
	else if (bAgentExplorer4) { 
		document.all("spanMenu").style.top=bbody.scrollTop; 
	}
	return true;
}

function InvokeMenu () {
	if (bAgentNetscape4) { 
		document.write('<layer id="layerMenu" left="-115" width="140" top="0" height="350" clip="0,0,141,379" onMouseOver="javascript:SetMenuPosition(-2);" onMouseOut="javascript:SetMenuPosition(-115);">\n<img src="images/menu3.gif" width=140 height=350 border=0 usemap="#menumap">\n</layer>\n'); 
	}
	else if (bAgentExplorer4) { 
		document.write('<span id="spanMenu" onMouseOver="javascript:SetMenuPosition(-2);" onMouseOut="javascript:SetMenuPosition(-115);">\n<img src="images/menu3.gif" width=140 height=350 border=0 usemap="#menumap">\n</span>\n'); 
	}
	if (bAgentNetscape4 || bAgentExplorer4) { 
		setInterval("PositionMenu()", 200);
	}
	return true;
}