function checkStep(myStep)
{

	// sets results, preview and shows element itself
	switch (myStep) {

  	 	case "WM1":

   	 		unsetStep('Adressen');

   	 		// check selections of WM1: setSelection and check count only, there are no dependencies in WM1
			WM1 = document.getElementById('Wahlmodul1');

			var Modulename;
			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++) {


			// remove this Modulename from WM3
			if (Modulename) {

				unlinkelements('Wahlmodul3');
				MySelect = document.getElementById('Wahlmodul3');


				for (var key in arrWM1) {

					if (Modulename != arrWM1[key]["Name"]) {

						selected = false;
						if (IDWM3 > 0 && key == IDWM3) selected = true;

						myitem = new Option(arrWM1[key]["Name"],key,false,selected);
						MySelect.options[MySelect.length] = myitem;
					}
				} // end for (key in arrWM1) {


				// set hint
				myinfo = document.getElementById('Hint');
				myinfo.innerHTML = "Bitte wählen Sie jetzt die Zusatzqualifikation aus";

			}

			// check for unique modules
			if (Wahlmodul1[0] != "" && Wahlmodul3[0] != "" && Wahlmodul1[0] == Wahlmodul3[0]) {
				alert("Bitte wählen Sie zwei unterschiedliche Module für Spezialisierung und Zusatzqualifikation 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 selections of WM3
			WM3 = document.getElementById('Wahlmodul3');

			maxCount = ChoicesWM3;
			count = 0;
			Wahlmodul3 = new Array(maxCount);

			for (var i = 0; i < WM3.length; i++) {

				if (WM3[i].selected) {

					ModuleID = WM3[i].value;
					Modulename = WM3[i].text;


					// set status
					if (count <= maxCount) {

						// save Selection in arr Wahlmodul1
						Wahlmodul3[ModuleID] = Modulename;

						myinfo = document.getElementById('pv_wahlmodul3');

						info = "";
						for (j in Wahlmodul3) {
	 						if (info != "") info += "<br>";
	 						info += Wahlmodul3[j];
						} // end for (i in arrFR) {
						myinfo.innerHTML = info;

						count ++;
					}

				} // end if (WM3[i].selected) {

			} // end for (var i = 0; i < WM3.length; i++) {

			// check for unique modules
			if (Wahlmodul1[0] != "" && Wahlmodul3[0] != "" && Wahlmodul1[0] == Wahlmodul3[0]) {
				alert("Bitte wählen Sie zwei unterschiedliche Module für Spezialisierung und Zusatzqualifikation aus.");
			}

			if (count == maxCount) {
				showStep('WM2');
			} else {
				if (count > maxCount) alert("Bitte wählen Sie maximal " + maxCount + " Modul(e) aus.");
				unsetStep('WM2');
			}


  	 	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
					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  " + maxCount + " Modul(e) aus";

			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 "WM1":

   	 		// delete results
   	 		Wahlmodul1 = new Array();
   	 		Wahlmodul2 = new Array();

   	 		// hide elements, 3 in this case
   	 		myelement = document.getElementById('Wahlmodule');
			setOpacity(myelement,5);

			myelement = document.getElementById('Wahlmodule1');
			setOpacity(myelement,5);

			// remove status
			myinfo = document.getElementById('pv_wahlmodul1');
			myinfo.innerHTML = "-";

  	 	break;

  	 	case "WM2":

   	 		// delete results
   	 		Wahlmodul2 = new Array();

   	 		// hide element
			myelement = document.getElementById('Wahlmodule2');
			setOpacity(myelement,5);

			// remove status
			myinfo = document.getElementById('pv_wahlmodul2');
			myinfo.innerHTML = "-";

  	 	break;

  	 	case "Adressen":

   	 		// hide element
			myelement = document.getElementById('Adressen');
			setOpacity(myelement,5);

  	 	break;

	} // end switch (Step) {
}


function showStep(myStep)
{

	// unsets results, preview and hides element itself
	switch (myStep) {

  	 	case "WM1":

			maxCount = ChoicesWM1;

			// prepare next step
			total = 21;
			if (total == maxCount) checkStep('WM1');


  	 	break;

  	 	case "WM3":

			maxCount = ChoicesWM3;

			// prepare next step
			total = 21;
			if (total == maxCount) checkStep('WM3');


  	 	break;

  	 	case "WM2":

   	 		maxCount = ChoicesWM2;

   	 		myelement = document.getElementById('Wahlmodule2');
   	 		setOpacity(myelement,9);

			// prepare next step
			total = 21;
			if (total == maxCount) checkStep('WM2');

			// set hint
			myinfo = document.getElementById('Hint');
			myinfo.innerHTML = "Bitte wählen Sie  W1-Qualifikationen aus";

  	 	break;

  	 	case "Adressen":

  	 		myelement = document.getElementById('Adressen');
			setOpacity(myelement,9);

			myelement = document.getElementById('Azubi');
			setOpacity(myelement,9);

			myelement = document.getElementById('Ausbildungsbetrieb');
			setOpacity(myelement,9);

			// set hint
			myinfo = document.getElementById('Hint');
			myinfo.innerHTML = "Bitte geben Sie jetzt die Adressen ein";


  	 	break;

	} // end switch (Step) {
}