function change_medium()
{
	// Aufruf aus step1.cnt
	
	var new_medium = document.forms.step1_cnt.elements.medium.value;
	
	document.getElementById('medium_oil').style.display = "none";
	document.getElementById('medium_gas').style.display = "none";
	document.getElementById('flow_unit_liquid').style.display = "none";
	document.getElementById('flow_unit_gas').style.display = "none";
	
	switch(new_medium)
	{
		case "1":		// Wasser
			document.getElementById('flow_unit_liquid').style.display = "inline";
			break;
			
		case "2":		// Öl
			document.getElementById('flow_unit_liquid').style.display = "inline";
			document.getElementById('medium_oil').style.display = "inline";
			break;
			
		case "3":
			document.getElementById('flow_unit_gas').style.display = "inline";
			document.getElementById('medium_gas').style.display = "inline";
	}
}

function change_tamb_unit()
{
	// Aufruf aus step3.cnt
	
	var formelement = document.forms.step3_cnt.temp_unit3;
	document.forms.step3_cnt.elements.tamb_unit.value = formelement.options[formelement.selectedIndex].text;
}

function change_switchcontact()
{
	// Aufruf aus step4.cnt
	
	var switchcontact = document.forms.step4_cnt.elements.switch_contact.value;
	
	document.getElementById('switchpoint').style.display = "none";
	
	if(switchcontact != "0" && switchcontact != "7")
	{
		document.getElementById('switchpoint').style.display = "table-row";
	}
	
	change_switchpoint();
}

function change_switchpoint()
{
	// Aufruf aus step4.cnt und function change_switchcontact
	
	var switchcontact = document.forms.step4_cnt.elements.switch_contact.value;
	var switchpoint = document.forms.step4_cnt.elements.switchpoint.value;
	
	document.getElementById('switchpoint1').style.display = "none";
	document.getElementById('switchpoint2').style.display = "none";
	document.getElementById('info_required').style.display = "none";
	
	document.getElementById('lbl_sp2').innerHTML = "";
	
	if(switchpoint == 2)
	{
		switch(switchcontact)
		{
			case "1":		// 1 Schließer ODER 1 Wechsler
			case "3":
				document.getElementById('switchpoint1').style.display = "table-row";
				document.getElementById('info_required').style.display = "table-row";
				break;
				
			case "2":
			case "4":
			case "5":
			case "6":				
				document.getElementById('switchpoint1').style.display = "table-row";
				document.getElementById('switchpoint2').style.display = "table-row";
				document.getElementById('info_required').style.display = "table-row";
				
				if(switchcontact != "6")
				{
					document.getElementById('lbl_sp2').innerHTML = document.getElementById('lbl_sp2').innerHTML + " (*)";
				}
		}
	}
}

function change_conn_size()
{
	// Aufruf aus step3.cnt
	// Anzeige der passenden Anschlussgrößeneinheit
	
	var new_connection = document.forms.step3_cnt.elements.connection.value;
	
	document.forms.step3_cnt.elements.conn_size_none.style.display = "none";
	document.forms.step3_cnt.elements.conn_size_thread.style.display = "none";
	document.forms.step3_cnt.elements.conn_size_flange.style.display = "none";
	document.forms.step3_cnt.elements.conn_size_hose.style.display = "none";
	document.forms.step3_cnt.elements.conn_size_clamp.style.display = "none";
	document.forms.step3_cnt.elements.conn_size_bonded.style.display = "none";
	
	switch(new_connection)
	{
		case "1":		// Gewinde
			document.forms.step3_cnt.elements.conn_size_thread.style.display = "inline";
			break;
			
		case "2":	// Flansch, Zwischenflansch
		case "5":
			document.forms.step3_cnt.elements.conn_size_flange.style.display = "inline";
			break;
			
		case "3":		// Schlauch
			document.forms.step3_cnt.elements.conn_size_hose.style.display = "inline";
			break;
			
		case "4":		// Clamp-Anschluss
			document.forms.step3_cnt.elements.conn_size_clamp.style.display = "inline";
			break;
			
		case "6":		// Klebmuffe
			document.forms.step3_cnt.elements.conn_size_bonded.style.display = "inline";
			break;
			
		default:
			document.forms.step3_cnt.elements.conn_size_none.style.display = "inline";
	}
}