Untitled

<html>
<head>
<script language="text/javascript">
function Rechne() {
var y4 =  20;
var x1 = 35 / 2 + 8.5;
var x2 = 35 / 2 + 17;
var x3 = 35 / 2 + 25.5;
var x4 = 35 / 2 + 34;
var px1 = Math.pow(x1, 2);
var px2 = Math.pow(x2, 2);
var px3 = Math.pow(x3, 2);
var px4 = Math.pow(x4, 2);
var a = y4 / px4;
var y1 = a * px1;
var y2 = a * px2;
var y3 = a * px3;
document.write()"Pfeiler-1: " + y1);
document.write()"Pfeiler-2: " + y2);
document.write()"Pfeiler-3: " + y3);
document.write()"a: " + a);
}
</script>
</head>
<body>
<input type="button" value="Lösung" onclick="Rechne()" />
</body>
</html>