Code below works
PHP Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!-- JavaScript calculator -->
<HTML>
<HEAD>
<TITLE>K98Calculator</TITLE>
<SCRIPT LANGUAGE="JavaScript">
function CalculateSum(Atext, Btext, form)
{
var A = parseFloat(Atext);
var B = parseFloat(Btext);
form.Answer.value = (A + B);
}
function ClearForm(form)
{
form.input_A.value = "";
form.input_B.value = "";
form.Answer.value = "";
}
function SubtractSum(Atext, Btext, form)
{
var A = parseFloat(Atext);
var B = parseFloat(Btext);
form.Answer.value = (A - B);
}
function MultiplySum(Atext, Btext, form)
{
var A = parseFloat(Atext);
var B = parseFloat(Btext);
form.Answer.value = (A * B);
}
// end of JavaScript functions -->
</SCRIPT>
</HEAD>
<BODY>
<P><FONT SIZE="+2">MAUSER CALCULATOR</FONT></P>
<FORM NAME="Calculator" METHOD="post">
<P>Enter a number: <INPUT TYPE=TEXT NAME="input_A" SIZE=40></P>
<P>Enter a number: <INPUT TYPE=TEXT NAME="input_B" SIZE=40></P>
<P><INPUT TYPE="button" VALUE="Add Numbers" name="AddButton" onClick="CalculateSum(this.form.input_A.value, this.form.input_B.value, this.form)"></P>
<P><INPUT TYPE="button" VALUE="Subtract Numbers" name="SubtractButton" onClick="SubtractSum(this.form.input_A.value, this.form.input_B.value, this.form)"></P>
<P><INPUT TYPE="button" VALUE="Multiply Numbers" name="MultiplyButton" onClick="MultiplySum(this.form.input_A.value, this.form.input_B.value, this.form)"></P>
<P><INPUT TYPE="button" VALUE="Clear Fields" name="ClearButton" onClick="ClearForm(this.form)"></P>
<P>Answer = <INPUT TYPE=TEXT NAME="Answer" SIZE=45></P>
</FORM>
</BODY>
</HTML>