function set_menu() {
//=======================================================
     //detect browser settings for showing and hiding DIVs
     isNS4 = (document.layers) ? true : false;
     isIE4 = (document.all && !document.getElementById) ? true : false;
     isIE5 = (document.all && document.getElementById) ? true : false;
     isNS6 = (!document.all && document.getElementById) ? true : false;
//=======================================================

	winWidth = 	actualPageWidth();
		
	if (winWidth < "950") {

		if (isNS4) {
		document.Menu.style.top = "5";
		document.Buttons.style.visibility = "hidden";
		document.Buttons_screen.style.position = "relative";
		document.Buttons_screen.style.top = "10";
		document.Buttons_screen.style.visibility = "visible";

//			objElement = document.layers[strDivName];
		} else if (isIE4 || isIE5) {
		document.all.Menu.style.top = "5";
		document.all.Buttons.style.visibility = "hidden";
		document.all.Buttons_screen.style.position = "relative";
		document.all.Buttons_screen.style.top = "10";
		document.all.Buttons_screen.style.visibility = "visible";

//			objElement = document.all[strDivName].style;
		} else if (isNS6) {
		document.getElementById("Menu").style.top = "5";
		document.getElementById("Buttons").style.visibility = "hidden";
		document.getElementById("Buttons_screen").style.position = "relative";
		document.getElementById("Buttons_screen").style.top = "10";
		document.getElementById("Buttons_screen").style.visibility = "visible";
//		document.getElementById("Buttons_screen").style.visibility = "hidden";

//			objElement = document.getElementById(strDivName).style;
		}
		
	} else {

		if (isNS4) {
		document.Menu.style.top = "100";
		document.Buttons.style.visibility = "visible";
		document.Buttons_screen.style.visibility = "hidden";
		document.Buttons_screen.style.position = "absolute";
		document.Buttons_screen.style.top = "0";
		
//			objElement = document.layers[strDivName];
		} else if (isIE4 || isIE5) {
		document.all.Menu.style.top = "100";
		document.all.Buttons.style.visibility = "visible";
		document.all.Buttons_screen.style.visibility = "hidden";
		document.all.Buttons_screen.style.position = "absolute";
		document.all.Buttons_screen.style.top = "0";
		
//			objElement = document.all[strDivName].style;
		} else if (isNS6) {
		document.getElementById("Menu").style.top = "100";
		document.getElementById("Buttons").style.visibility = "visible";
		document.getElementById("Buttons_screen").style.visibility = "hidden";
		document.getElementById("Buttons_screen").style.position = "absolute";
		document.getElementById("Buttons_screen").style.top = "0";

//			objElement = document.getElementById(strDivName).style;
		}

	}	
	
	function actualPageWidth() {
		if (window.innerWidth != null)
			return window.innerWidth;
		if (document.body.clientWidth != null)
			return document.body.clientWidth;
		return(null);
	}

}