function showForm() {
	if (is_ie) {
		trStyle = "block";
	}
	else {
		trStyle = "table-row";
	}
	document.getElementById("muster2").style.display = "none";
	document.getElementById("muster3").style.display = "none";
	document.getElementById("muster4").style.display = "none";
	document.getElementById("muster5").style.display = "none";
	
	document.getElementById("input1").onkeyup = function() {
		if (document.getElementById("input1").value != "") {
			document.getElementById("muster2").style.display = trStyle;
		}
		else if (document.getElementById("input2").value == "" && 
		         document.getElementById("input3").value == "" &&
		         document.getElementById("input4").value == "" &&
		         document.getElementById("input5").value == ""  ) {
 					document.getElementById("muster2").style.display = "none";
		}
	}
	
	document.getElementById("input2").onkeyup = function() {
		if (document.getElementById("input2").value != "") {
			document.getElementById("muster3").style.display = trStyle;
		}
		else if (document.getElementById("input3").value == "" &&
		         document.getElementById("input4").value == "" &&
		         document.getElementById("input5").value == ""  ) {
 					document.getElementById("muster3").style.display = "none";
		}
	}

	document.getElementById("input3").onkeyup = function() {
		if (document.getElementById("input3").value != "") {
			document.getElementById("muster4").style.display = trStyle;
		}
		else if (document.getElementById("input4").value == "" &&
		         document.getElementById("input5").value == ""  ) {
 					document.getElementById("muster4").style.display = "none";
		}
	}
	document.getElementById("input4").onkeyup = function() {
		if (document.getElementById("input4").value != "") {
			document.getElementById("muster5").style.display = trStyle;
		}
		else if (document.getElementById("input5").value == ""  ) {
 					document.getElementById("muster5").style.display = "none";
		}
	}
	document.getElementById("input5").onkeyup = function() {
		if (document.getElementById("input5").value != "" &&
		    document.getElementById("input4").value != "") {
			document.getElementById("muster5").style.display = trStyle;
		}
	}
	
}