var DHTML = 0, DOM = 0, MS = 0, NS = 0, OP = 0;

if (window.opera) {
   OP = 1;
 }
 if(document.getElementById) {
   DHTML = 1;
   DOM = 1;
 }
 if(document.all && !OP) {
   DHTML = 1;
   MS = 1;
 }
if(document.layers && !OP) {
   DHTML = 1;
   NS = 1;
 }
// alert ("OP="+OP+", DHTML="+DHTML+", DOM="+DOM+", MS="+MS+", NS="+NS);


/* Anweisungen des Menues*/

/***********************************************/

function showmenu(id){
	if  (document.layers) { 
		 document.layers[id].visibility="visible";
	}
   else if (document.getElementById) {
		 document.getElementById(id).style.visibility="visible";
	}
}

/***********************************************/

function hideAllSubmenus() {
	if  (document.layers)  {
		 document.layers['submenu_UberUns'].visibility="hidden";
		 document.layers['submenu_Leistungen'].visibility="hidden";
		 document.layers['submenu_Arbeiten'].visibility="hidden";
	}
    else if (document.getElementById) { 
		document.getElementById('submenu_UberUns').style.visibility="hidden";
		document.getElementById('submenu_Leistungen').style.visibility="hidden";
		document.getElementById('submenu_Arbeiten').style.visibility="hidden";
	}
	// die Unterstreichungen des Menüs 1. Ranges entfernen:
  	document.getElementById('menu_Home').style.backgroundImage = "url('gif/Home.gif')";
  	document.getElementById('menu_UberUns').style.backgroundImage = "url('gif/UberUns.gif')";
  	document.getElementById('menu_Leistungen').style.backgroundImage = "url('gif/Leistungen.gif')";
  	document.getElementById('menu_Arbeiten').style.backgroundImage = "url('gif/Arbeiten.gif')";
  	document.getElementById('menu_Kontakt').style.backgroundImage = "url('gif/Kontakt.gif')";
}

/***********************************************/

/* Anweisung des Bildertauschs */

i11 = new Image();
i11.src = "gif/UberUns_1_Buro.gif";
i12 = new Image();
i12.src = "gif/UberUns_2_Ina.gif";
i13 = new Image();
i13.src = "gif/UberUns_3_Ronald.gif";
i14 = new Image();
i14.src = "gif/UberUns_4_Pressestimmen.gif";
i15 = new Image();
i15.src = "gif/UberUns_5_Projektliste.gif";

i21 = new Image();
i21.src = "gif/Leistungen_1_Profil.gif";
i22 = new Image();
i22.src = "gif/Leistungen_2_Planungsschritte.gif";
i23 = new Image();
i23.src = "gif/Leistungen_3_Planungshonorar.gif";
i24 = new Image();
i24.src = "gif/Leistungen_4_Beratungen.gif";
i25 = new Image();
i25.src = "gif/Leistungen_5_EnergetischeSanierung.gif";

i31 = new Image();
i31.src = "gif/Arbeiten_1.gif";
i32 = new Image();
i32.src = "gif/Arbeiten_2.gif";
i33 = new Image();
i33.src = "gif/Arbeiten_3.gif";
i34 = new Image();
i34.src = "gif/Arbeiten_4.gif";
// i35 = new Image();
// i35.src = "gif/Arbeiten_5.gif";


//  background-image:url(../gif/HomeOn.gif)
IMGsubmenu_Home = new Image();
IMGsubmenu_Home.src = "gif/HomeOn.gif";
IMGsubmenu_UberUns = new Image();
IMGsubmenu_UberUns.src = "gif/UberUnsOn.gif";
IMGsubmenu_Leistungen = new Image();
IMGsubmenu_Leistungen.src = "gif/LeistungenOn.gif";
IMGsubmenu_Arbeiten = new Image();
IMGsubmenu_Arbeiten.src = "gif/ArbeitenOn.gif";
IMGsubmenu_Kontakt = new Image();
IMGsubmenu_Kontakt.src = "gif/KontaktOn.gif";

imgL1 = new Image();
imgL1.src = 'gif/QLinksOVER.gif';
imgL2 = new Image();
imgL2.src = 'gif/QLinksON.gif';
imgM1 = new Image();
imgM1.src = 'gif/QMitteOVER.gif';
imgM2 = new Image();
imgM2.src = 'gif/QMitteON.gif';

// imgID - Name des auszutauschenden Bildes z.B. foto2
// imgObjName - Name des Bildes mit dem ausgetauscht wird z.B. i11
// dot - Typ Quadrat
// Beispiel: hiLite('submenu_Leistungen','i11','M')

function hiLite(imgID,imgObjName,dot) {
	// den aktiven orangenen Menuepunkt aktivieren:
	var l = "url(gif/QLinksOVER.gif)";
	var m = "url(gif/QMitteOVER.gif)";

	document.getElementById('i11').style.backgroundImage = "url(gif/QLinksOVER.gif)";
	document.getElementById('i12').style.backgroundImage = "url(gif/QMitteOVER.gif)";
	document.getElementById('i13').style.backgroundImage = "url(gif/QMitteOVER.gif)";
	document.getElementById('i14').style.backgroundImage = "url(gif/QMitteOVER.gif)";
	document.getElementById('i15').style.backgroundImage = "url(gif/QMitteOVER.gif)";

	document.getElementById('i21').style.backgroundImage = "url(gif/QLinksOVER.gif)";
	document.getElementById('i22').style.backgroundImage = "url(gif/QMitteOVER.gif)";
	document.getElementById('i23').style.backgroundImage = "url(gif/QMitteOVER.gif)";
	document.getElementById('i24').style.backgroundImage = "url(gif/QMitteOVER.gif)";
	document.getElementById('i25').style.backgroundImage = "url(gif/QMitteOVER.gif)";	

	document.getElementById('i31').style.backgroundImage = "url(gif/QLinksOVER.gif)";
	document.getElementById('i32').style.backgroundImage = "url(gif/QMitteOVER.gif)";
	document.getElementById('i33').style.backgroundImage = "url(gif/QMitteOVER.gif)";
	document.getElementById('i34').style.backgroundImage = "url(gif/QMitteOVER.gif)";
	// document.getElementById('i35').style.backgroundImage = "url(gif/QMitteOVER.gif)";


	if (dot != 'X') {
		var dd = eval('img' + dot +  "2.src");
	  	document.getElementById(imgObjName).style.backgroundImage = "url(" + dd + ")";

		// Text rechts neben den Quadraten im Submenue als Bild ausgeben:
		var pp = eval(imgObjName + ".src");
		document.images[imgID].src = pp;
	}

	// Hauptmenüpunkt mit "aktivem" Unterstrich als Hintergrundbild ausgeben:
	var kk = imgID.substr(3);
	var bg = eval("IMG" + imgID + ".src");
  	document.getElementById(kk).style.backgroundImage = "url(" + bg + ")";
  	
}

/***********************************************/

/* Menutext hinter den Quadraten */

function hiLite3(imgID,imgObjName) {
	document.images['z'+imgID].src = eval(imgObjName + ".src");
	document.getElementById('sub93hover'+imgID).style.visibility = 'visible';
}

function hiLite4(imgID,imgObjName) {
	document.images['z'+imgID].src = eval(imgObjName + ".src");
	document.getElementById('sub94hover'+imgID).style.visibility = 'visible';
}

function hiLite5(imgID,imgObjName) {
	document.images['z'+imgID].src = eval(imgObjName + ".src");
	document.getElementById('sub95hover'+imgID).style.visibility = 'visible';
}