var xmlHttp2;

function GetXmlHttpObject2(){var xmlHttp2=null;try{xmlHttp2=new XMLHttpRequest();}catch(e){try{xmlHttp2=new ActiveXObject("Msxml2.XMLHTTP");}catch(e){xmlHttp2=new ActiveXObject("Microsoft.XMLHTTP");}}return xmlHttp2;}

function set_nav(id){
	xmlHttp2=GetXmlHttpObject2();
	if (xmlHttp2==null){
		alert ("Nid yw'r porwr yn cynnal AJAX");
		return;
	}
	var argument = "map=" + encodeURIComponent(id);
	xmlHttp2.open("POST","n_includes/setnav.inc.php",true);
	xmlHttp2.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	xmlHttp2.setRequestHeader("Content-length", argument.length);
	xmlHttp2.setRequestHeader("Connection", "close");
		xmlHttp2.onreadystatechange = function() {
			if(xmlHttp2.readyState == 4 && xmlHttp2.status == 200) {
				//alert("Proseswyd: " + xmlHttp2.responseText);
				//refresh_books(filtered);
			}
		}
	xmlHttp2.send(argument);
}


function switchMap(com){
	if(com == "to_conv"){
		document.getElementById('mapnav').className="hide";
		document.getElementById('mapbar2').className="hide";
		document.getElementById('connav2').className="show";
		document.getElementById('main_body').className="show";
		set_nav('conv');
	}else{
		document.getElementById('mapnav').className="show";
		document.getElementById('mapbar2').className="show";
		document.getElementById('maparrowup').className="show";
		document.getElementById('maparrowdown').className="hide";
		document.getElementById('connav2').className="hide";
		document.getElementById('main_body').className="hide";
		set_nav('map');
	}
}
function closeMap(num){
	document.getElementById('mapnav').className="hide";
	document.getElementById('mapbar2').className="show";
	document.getElementById('maparrowup').className="hide";
	document.getElementById('maparrowdown').className="show";
	document.getElementById('main_body').className="show";
}
function openMap(num){
	document.getElementById('mapnav').className="show";
	document.getElementById('mapbar2').className="show";
	document.getElementById('maparrowup').className="show";
	document.getElementById('maparrowdown').className="hide";
	document.getElementById('main_body').className="hide";
}
function goMap(url){
	document.getElementById('mapnav').className="hide";
	document.getElementById('maparrow').className="down";
	
}

function doShowPHP(){
	document.getElementById('dat_php').className="show";
	document.getElementById('dat_js').className="hide";
	document.getElementById('dat_dyb').className="hide";
}
function doShowJS(){
	document.getElementById('dat_php').className="hide";
	document.getElementById('dat_js').className="show";
	document.getElementById('dat_dyb').className="hide";
}
function doShowDYB(){
	document.getElementById('dat_php').className="hide";
	document.getElementById('dat_js').className="hide";
	document.getElementById('dat_dyb').className="show";
}
//ar gyfer storio iaith
function doShowNM(){
	document.getElementById('dat_mewn').className="show";
	document.getElementById('dat_db').className="hide";
	document.getElementById('dat_amgau').className="hide";
	document.getElementById('dat_dau').className="hide";
	document.getElementById('dat_mvc').className="hide";
}
function doShowDB(){
	document.getElementById('dat_mewn').className="hide";
	document.getElementById('dat_db').className="show";
	document.getElementById('dat_amgau').className="hide";
	document.getElementById('dat_dau').className="hide";
	document.getElementById('dat_mvc').className="hide";
}
function doShowFFA(){
	document.getElementById('dat_amgau').className="show";
	document.getElementById('dat_mewn').className="hide";
	document.getElementById('dat_db').className="hide";
	document.getElementById('dat_dau').className="hide";
	document.getElementById('dat_mvc').className="hide";
}
function doShowFFANM(){
	//alert("gg");
	document.getElementById('dat_dau').className="show";
	document.getElementById('dat_mewn').className="hide";
	document.getElementById('dat_amgau').className="hide";
	document.getElementById('dat_db').className="hide";
	document.getElementById('dat_mvc').className="hide";

}
function doShowMVC(){
	document.getElementById('dat_mewn').className="hide";
	document.getElementById('dat_db').className="hide";
	document.getElementById('dat_amgau').className="hide";
	document.getElementById('dat_dau').className="hide";
	document.getElementById('dat_mvc').className="show";
}
//ar gyfer php
function doShowC(){
	document.getElementById('cyf_php').className="show";
	document.getElementById('cyn_php').className="hide";
	document.getElementById('new_php').className="hide";
	document.getElementById('gor_php').className="hide";
}
function doShowGOR(){
	document.getElementById('cyf_php').className="hide";
	document.getElementById('cyn_php').className="hide";
	document.getElementById('new_php').className="hide";
	document.getElementById('gor_php').className="show";
}
function doShowCYN(){
	document.getElementById('cyf_php').className="hide";
	document.getElementById('cyn_php').className="show";
	document.getElementById('new_php').className="hide";
	document.getElementById('gor_php').className="hide";
}
function doShowNEW(){
	document.getElementById('cyf_php').className="hide";
	document.getElementById('cyn_php').className="hide";
	document.getElementById('new_php').className="show";
	document.getElementById('gor_php').className="hide";
}
//ar gyfer XHTML
function doShowSYL(){
	document.getElementById('SYL').className="show";
	document.getElementById('CYMHLETH').className="hide";
	document.getElementById('HEAD').className="hide";
	document.getElementById('GOSOD').className="hide";
	document.getElementById('FFORM').className="hide";
	document.getElementById('PRIN').className="hide";
	document.getElementById('CYFRWNG').className="hide";
}

function doShowCYMHLETH(){
	document.getElementById('SYL').className="hide";
	document.getElementById('CYMHLETH').className="show";
	document.getElementById('HEAD').className="hide";
	document.getElementById('GOSOD').className="hide";
	document.getElementById('FFORM').className="hide";
	document.getElementById('PRIN').className="hide";
	document.getElementById('CYFRWNG').className="hide";
}

function doShowHEAD(){
	document.getElementById('SYL').className="hide";
	document.getElementById('CYMHLETH').className="hide";
	document.getElementById('HEAD').className="show";
	document.getElementById('GOSOD').className="hide";
	document.getElementById('FFORM').className="hide";
	document.getElementById('PRIN').className="hide";
	document.getElementById('CYFRWNG').className="hide";
}

function doShowGOSOD(){
	document.getElementById('SYL').className="hide";
	document.getElementById('CYMHLETH').className="hide";
	document.getElementById('HEAD').className="hide";
	document.getElementById('GOSOD').className="show";
	document.getElementById('FFORM').className="hide";
	document.getElementById('PRIN').className="hide";
	document.getElementById('CYFRWNG').className="hide";
}

function doShowFFORM(){
	document.getElementById('SYL').className="hide";
	document.getElementById('CYMHLETH').className="hide";
	document.getElementById('HEAD').className="hide";
	document.getElementById('GOSOD').className="hide";
	document.getElementById('FFORM').className="show";
	document.getElementById('PRIN').className="hide";
	document.getElementById('CYFRWNG').className="hide";
}

function doShowPRIN(){
	document.getElementById('SYL').className="hide";
	document.getElementById('CYMHLETH').className="hide";
	document.getElementById('HEAD').className="hide";
	document.getElementById('GOSOD').className="hide";
	document.getElementById('FFORM').className="hide";
	document.getElementById('PRIN').className="show";
	document.getElementById('CYFRWNG').className="hide";
}

function doShowCYFRWNG(){
	document.getElementById('SYL').className="hide";
	document.getElementById('CYMHLETH').className="hide";
	document.getElementById('HEAD').className="hide";
	document.getElementById('GOSOD').className="hide";
	document.getElementById('FFORM').className="hide";
	document.getElementById('PRIN').className="hide";
	document.getElementById('CYFRWNG').className="show";
}

function doShowCSQL(){
	document.getElementById('CSQL').className="show";
	document.getElementById('AGSQL').className="hide";
	document.getElementById('ISQL').className="hide";
	document.getElementById('PSQL').className="hide";
}
function doShowAGSQL(){
	document.getElementById('CSQL').className="hide";
	document.getElementById('AGSQL').className="show";
	document.getElementById('ISQL').className="hide";
	document.getElementById('PSQL').className="hide";
}
function doShowISQL(){
	document.getElementById('CSQL').className="hide";
	document.getElementById('AGSQL').className="hide";
	document.getElementById('ISQL').className="show";
	document.getElementById('PSQL').className="hide";
}
function doShowPSQL(){
	document.getElementById('CSQL').className="hide";
	document.getElementById('AGSQL').className="hide";
	document.getElementById('ISQL').className="hide";
	document.getElementById('PSQL').className="show";
}

function ffurflen_neges(){
	if(document.getElementById('form_neges').className =="hide"){
		document.getElementById('form_neges').className="show";
		document.getElementById('testun_neges').title="cuddiwch y ffurflen";
	}else{
		document.getElementById('form_neges').className="hide";
		document.getElementById('testun_neges').title="dangoswch y ffurflen";
	}
}

function showCSS_E(){
	alert("hho");
	document.getElementById('css_E').className="show";
	document.getElementById('css_F').className="hide";
	document.getElementById('css_M').className="hide";
	document.getElementById('css_G').className="hide";
}
function showCSS_F(){
	document.getElementById('css_E').className="hide";
	document.getElementById('css_F').className="show";
	document.getElementById('css_M').className="hide";
	document.getElementById('css_G').className="hide";
}
function showCSS_M(){
	document.getElementById('css_E').className="hide";
	document.getElementById('css_F').className="hide";
	document.getElementById('css_M').className="show";
	document.getElementById('css_G').className="hide";
}
function showCSS_G(){
	document.getElementById('css_E').className="hide";
	document.getElementById('css_F').className="hide";
	document.getElementById('css_M').className="hide";
	document.getElementById('css_G').className="show";
}