function checkStep(myStep) 
{
	
	// sets results, preview and shows element itself
	switch (myStep) {
 	
 		case "Fachrichtung":
   	 		
   	 		// getID, name
			MySelect = document.getElementById('Fachrichtung');
			FachrichtungID = MySelect.options[MySelect.selectedIndex].value;
			Fachrichtung = MySelect.options[MySelect.selectedIndex].text;
   	 		
			// remove depending options, they are maybe set before
			unsetStep('Adressen');
			unsetStep('Spezialisierung');
			unsetStep('WM1');
			unsetStep('WM2');
			unsetStep('WM3');
	
			if (FachrichtungID > 0) {
				
				// determine next step 
				if (arrFR[FachrichtungID]["Spezialisierung"] == 1) {
					unsetStep('WM1');
					showStep('Spezialisierung');
				} else {
		 			showStep('WM1');
		 			// IE fix, IE needs a rest otherwise autoselect of WM1 fails
		 			window.setTimeout("checkStep('WM1')", 10);
				} // end if (arrFR[Fachrichtung]["Spezialisierung"] == 1) {
		
			} else {
				// no choice made	
	 			//resetall();
	 			Bezeichnung = "-";
			} // end if (Fachrichtung > 0) {
	
			// set status
			myinfo = document.getElementById('pv_fachrichtung');
			myinfo.innerHTML = Fachrichtung;
			
			// set hint
			myinfo = document.getElementById('Hint');
			myinfo.innerHTML = arrFR[FachrichtungID]["Hint"];
			
  	 	break;
  	 	
  	 	case "Spezialisierung":
  	 		
  	 		unsetStep('Adressen');
  	 		unsetStep('WM1');
			unsetStep('WM2');
			unsetStep('WM3');
  	 		
  	 		// get value, text
  	 		myelement = document.getElementById('Printmedien');
  	 		if (myelement.checked) Spezialisierung = myelement.value;
  	 		 
  	 		myelement = document.getElementById('Digitalmedien');
  	 		if (myelement.checked) Spezialisierung = myelement.value;
			
			// set hint
			myinfo = document.getElementById('Hint');
			myinfo.innerHTML = "Bitte wählen Sie jetzt die Wahlmodule aus";
			
			if (Spezialisierung != '') {
				// show next step
				showStep('WM1');
				// set status
				myinfo = document.getElementById('pv_spezialisierung');
				myinfo.innerHTML = Spezialisierung;
			}
			
  	 	break;
  	 	
  	 	case "WM1":
   	 		unsetStep('Adressen');
   	 		
   	 		// check selections of WM1: setSelection and check count only, there are no dependencies in WM1
			WM1 = document.getElementById('Wahlmodul1');
			
			maxCount = ChoicesWM1;
			count = 0;
			Wahlmodul1 = new Array(maxCount);
			
			for (var i = 0; i < WM1.length; i++) {
		
				if (WM1[i].selected) {
			
					ModuleID = WM1[i].value;
					Modulename = WM1[i].text;
			
					// set status
					if (count <= maxCount) {
				
						// save Selection in arr Wahlmodul1
						Wahlmodul1[count] = Modulename;
					
						myinfo = document.getElementById('pv_wahlmodul1');
						// join add too many html breaks
						//myinfo.innerHTML = Wahlmodul1.join("<br>");
						
						info = "";
						for (j in Wahlmodul1) {
	 						if (info != "") info += "<br>";
	 						info += Wahlmodul1[j];
						} // end for (i in arrFR) {
						myinfo.innerHTML = info;
						
						count ++;
					}
					
				} // end if (WM1[i].selected) {
		
			} // end for (var i = 0; i < WM1.length; i++) {
			
			
			// set hint
			myinfo = document.getElementById('Hint');
			myinfo.innerHTML = "Bitte wählen Sie hier " + maxCount + " Modul(e) aus";
			
			if (count == maxCount) {
				showStep('WM2');
			} else {
				if (count > maxCount) alert("Bitte wählen Sie maximal " + maxCount + " Modul(e) aus.");
				unsetStep('WM2');
				unsetStep('WM3');
			}
			
			
  	 	break;
  	 	
  	 	case "WM2":
   	 		unsetStep('Adressen');	
   	 		// check selection of WM2:  get values, count and check dependecies
			WM2 = document.getElementById('Wahlmodul2');
	
			maxCount = ChoicesWM2;
			count = 0;
			validModule = false;
			Wahlmodul2 = new Array(maxCount);
			
			for (var i = 0; i < WM2.length; i++) {
		
				if (WM2[i].selected) {	
					
					// get Module ID and name to check dependecies
					ModuleID = WM2.options[i].value; 
					Modulename = WM2.options[i].text;
					
					// check if there are any dependecies for this module
					if (arrWM2[ModuleID]["Dependecies"] != "") validModule = checkDependecies(arrWM2[ModuleID]["Dependecies"]);		
					else validModule = true;
			
					// set results if selection is valid or print warning
					if (validModule && count <= maxCount) {
						
						// save Selection in arr Wahlmodul1
						Wahlmodul2[count] = Modulename;
					
						myinfo = document.getElementById('pv_wahlmodul2');
						// join add too many html breaks
						//myinfo.innerHTML = Wahlmodul2.join("<br>");
						info = "";
						for (j in Wahlmodul2) {
	 						if (info != "") info += "<br>";
	 						info += Wahlmodul2[j];
						} // end for (i in arrFR) {
						myinfo.innerHTML = info;
						count ++;
					
					} else if (!validModule) {
					
						WM2[i].selected = false;	
						warnmsg = "Um das Modul \"" + Modulename + "\" wählen zu können müssen Sie \"" + arrWM2[ModuleID]["Dependecies"] + "\" ausgewählt haben.";
						alert(warnmsg)
						
					} // end if (validSelection)
				} // end if (element[i].selected) {	
		
			} // end for (var i = 0; i < element.length; i++) {
			
			// set hint
			myinfo = document.getElementById('Hint');
			myinfo.innerHTML = "Bitte wählen Sie hier " + maxCount + " Modul(e) aus";
			
			if (count == maxCount) {
				showStep('WM3');
			} else {
				if (count > maxCount) alert("Bitte wählen Sie maximal " + maxCount + " Modul(e) aus.");
				unsetStep('WM3');
			}
			
			
  	 	break;
  	 	
  	 	case "WM3":
   	 		unsetStep('Adressen');
   	 		// check selection of WM3: get values, count and check dependecies
			WM3 = document.getElementById('Wahlmodul3');
	
			maxCount = ChoicesWM3;
			count = 0;
			validModule = false;
			Wahlmodul3 = new Array(maxCount);
			
			for (var i = 0; i < WM3.length; i++) {
				
				if (WM3[i].selected) {
				
					
					// get Module ID and name to check dependecies
					ModuleID = WM3.options[i].value; 
					Modulename = WM3.options[i].text; 
					
					// check if there are any dependecies for this module
					if (arrWM3[ModuleID]["Dependecies"] != "") validModule = checkDependecies(arrWM3[ModuleID]["Dependecies"]);		
					else validModule = true;	
			
					// set results if selection is valid or print warning
					if (validModule && count <= maxCount) {
				
						// save Selection in arr Wahlmodul1
						Wahlmodul3[count] = Modulename;
					
						myinfo = document.getElementById('pv_wahlmodul3');
						//myinfo.innerHTML = Wahlmodul3.join("<br>");
						
						info = "";
						for (j in Wahlmodul3) {
	 						if (info != "") info += "<br>";
	 						info += Wahlmodul3[j];
						} // end for (i in arrFR) {
						myinfo.innerHTML = info;
						count ++;
					
					} else if (!validModule) {
						
						WM3[i].selected = false;
						warnmsg = "Um das Modul \"" + Modulename + "\" wählen zu können müssen Sie \"" + arrWM3[ModuleID]["Dependecies"] + "\" ausgewählt haben.";
						alert(warnmsg);
						
					} // end if (validSelection)
				} // end if (WM3[i].selected) {
			} // end for (var i = 0; i < WM3.length; i++) {
	
			if (count == maxCount) {
				showStep('Adressen');
			} else {
				if (count > maxCount) alert("Bitte wählen Sie maximal " + maxCount + " Modul(e) aus.");
			}
			
  	 	break;
  	 	
  	 	case "Adressen":
  	 	
   	 		// set hint
			myinfo = document.getElementById('Hint');
			myinfo.innerHTML = "Bitte geben Sie jetzt die Adressen ein";
			
  	 	break;
  	 	
	} // end switch (Step) {
}



function unsetStep(myStep) 
{
	
	// unsets results, preview and hides element itself
	switch (myStep) {
 	
 		case "Fachrichtung":
 			init();
 			
 			// remove value
 			FachrichtungID = "";
 			Fachrichtung = "";
 			
 			// set status
			myinfo = document.getElementById('pv_fachrichtung');
			myinfo.innerHTML = "-";
			
 		break;
 		
 		case "Spezialisierung":
   	 		Spezialisierung = "";
   	 		
   	 		// hide element
			myelement = document.getElementById('Spezialisierungen');
			myelement.style.visibility = "hidden";
			
			// remove status info 
			myinfo = document.getElementById('pv_spezialisierung');
			myinfo.innerHTML = "-";
			
			// remove value
			mybutton = document.getElementById('Printmedien');
			mybutton.checked = false;
			
			mybutton = document.getElementById('Digitalmedien');
			mybutton.checked = false;
			
  	 	break;
  	 	
  	 	case "WM1":
   	 		
   	 		// delete results
   	 		Wahlmodul1 = new Array();
   	 		Wahlmodul2 = new Array();
   	 		Wahlmodul3 = new Array();
   	 		
   	 		// remove modules
   	 		unlinkelements('Wahlmodul1');
   	 		
   	 		// hide elements, 3 in this case
   	 		myelement = document.getElementById('Wahlmodule');
			//myelement.style.visibility = "hidden";
			setOpacity(myelement,5);
			
			myelement = document.getElementById('Wahlmodule1');
			//myelement.style.visibility = "hidden";
			setOpacity(myelement,5);
			
			// remove status
			myinfo = document.getElementById('pv_wahlmodul1');
			myinfo.innerHTML = "-";
			
  	 	break;
  	 	
  	 	case "WM2":
   	 		
   	 		// delete results
   	 		Wahlmodul2 = new Array();
   	 		Wahlmodul3 = new Array();
   	 		
   	 		// remove modules
   	 		unlinkelements('Wahlmodul2');
   	 		
   	 		// hide element
			myelement = document.getElementById('Wahlmodule2');
			//myelement.style.visibility = "hidden";
			setOpacity(myelement,5);
			
			// remove status
			myinfo = document.getElementById('pv_wahlmodul2');
			myinfo.innerHTML = "-";
			
  	 	break;
  	 	
  	 	case "WM3":
   	 		
   	 		// delete results
   	 		Wahlmodul3 = new Array();
   	 		
   	 		// remove modules
   	 		unlinkelements('Wahlmodul3');
   	 		
   	 		// hide element
			myelement = document.getElementById('Wahlmodule3');
			//myelement.style.visibility = "hidden";
			setOpacity(myelement,5);
			
			// remove status
			myinfo = document.getElementById('pv_wahlmodul3');
			myinfo.innerHTML = "-";
			
  	 	break;
  	 	
  	 	case "Adressen":
  	 	
   	 		// hide element
			myelement = document.getElementById('Adressen');
			//myelement.style.visibility = "hidden";
			setOpacity(myelement,5);
			
  	 	break;
  	 	
	} // end switch (Step) {
}


function showStep(myStep) 
{
	
	// unsets results, preview and hides element itself
	switch (myStep) {
 	
 		case "Spezialisierung":
   	 		
			myelement = document.getElementById('Spezialisierungen');
			myelement.style.visibility = "visible";
			setOpacity(myelement,10);
	
			unsetStep('WM1');
			unsetStep('WM2');
			unsetStep('WM3');
			
  	 	break;
  	 	
  	 	case "WM1":
  	 	
  	 		// show elements, 4 in this case
			myelement = document.getElementById('Wahlmodule');
			//myelement.style.visibility = "visible";
			setOpacity(myelement,10);
			
			myelement = document.getElementById('Wahlmodule1');
			//myelement.style.visibility = "visible";
			setOpacity(myelement,10);
		
			maxCount = ChoicesWM1;
		
			// insert options
			updateelements('Wahlmodul1',false,arrWM1,arrFR[FachrichtungID]["Wahlmodul1"],maxCount,Wahlmodul1);
	 		
			// prepare next step
			 total = countelements(arrFR[FachrichtungID]["Wahlmodul1"],arrWM1);
			 if (total == maxCount) {
	 			checkStep('WM1');
			 } // end if (total == arrFR[FachrichtungID]["Choices"]) {	

  	 	break;
  	 	
  	 	case "WM2":
   	 		maxCount = ChoicesWM2;
	
			// show element
			myelement = document.getElementById("Wahlmodule2");
			//myelement.style.visibility = "visible";
			setOpacity(myelement,10);
	 	
			// insert options
			updateelements("Wahlmodul2",false,arrWM2,arrFR[FachrichtungID]["Wahlmodul2"],maxCount,Wahlmodul2);
	 	
			// remove depending options	
			unlinkelements('Wahlmodul3');	
	 
			// prepare next step
			total = countelements(arrFR[FachrichtungID]["Wahlmodul2"],arrWM2);
			if (total == maxCount) checkStep('WM2');
			
  	 	break;
  	 	
  	 	case "WM3":
			// show element
			myelement = document.getElementById("Wahlmodule3");
			//myelement.style.visibility = "visible";
			setOpacity(myelement,10);
	
			maxCount = ChoicesWM3;
	
			// insert options
			updateelements('Wahlmodul3',false,arrWM3,arrFR[FachrichtungID]["Wahlmodul3"],maxCount,Wahlmodul3);
	
			// prepare next step
			total = countelements(arrFR[FachrichtungID]["Wahlmodul3"],arrWM3);
	
			if (total == maxCount) checkStep('WM3');
			
  	 	break;
  	 	
  	 	case "Adressen":
  	 		
  	 		myelement = document.getElementById('Adressen');
			//myelement.style.visibility = "visible";
			setOpacity(myelement,9);
			
			myelement = document.getElementById('AVDate');
			//myelement.style.visibility = "visible";
			setOpacity(myelement,9);
			
			myelement = document.getElementById('Azubi');
			setOpacity(myelement,9);
			
			myelement = document.getElementById('Ausbildungsbetrieb');
			setOpacity(myelement,9);
			
			myelement = document.getElementById('Formate');
			setOpacity(myelement,9);
			
			// set hint
			myinfo = document.getElementById('Hint');
			myinfo.innerHTML = "Bitte geben Sie jetzt die Adressen ein";
			
			
  	 	break;
  	 	
	} // end switch (Step) {
}