Ich habs mal versucht umzusetzen.
Geht nicht.
Wo mach ich was falsch?
<html>
<head>
<title>New Page 1</title>
<SCRIPT language-"JavaScript">
<!--
function calc() {
var myForm = document.forms[0]; // Form
var result = Number(myForm.wert1.value) + Number(myForm.wert2.value) + Number(myForm.wert3.value); // Werte addieren
alert(result); // Ausgabe
}
//-->
</script>
</head>
<body>
<form name="myForm" action="JavaScript:calc(); ">
<input type="text" name"wert1" id="wert1" value="" size="20" name="wert1" />
<input type="text" name"wert2" id="wert2" value="" size="20" name="wert2" />
<input type="text" name"wert3" id="wert3" value="" size="20" name="wert3" />
<input type="button" name"calc" id="calc" value="Berechne" onclick="calc();" name="calc" />
</form>
</body>
</html>