Need help with Javascript radio buttons (values)

Hello,

I’m new to learning JavaScript. I was trying out a simple script but I can’t

seem to make it work:

[HTML]<HTML><HEAD><TITLE>Radio Buttons</TITLE>
<SCRIPT language=JavaScript>

function process()
{
1 for (i = 0; i < document.form1.Q1.length; i++)
2 {if (document.form1.Q1[i].checked == true)
3 {Num1 = document.form1.Q1[i].value;}
4 }
5
6 for (i=0; i < document.form1.Q2.length; i++)
7 {if(document.form1.Q2[i].checked == true)
8 {Num2 = document.form1.Q2[i].value;}
9 }
10
11 document.write("The sum is " + parseInt(Num1) + parseInt12(Num2));
13}
14</SCRIPT>

<BODY>
<FORM name=form1>
<H4>First Set</H4>

<INPUT type=radio value=2 name=Q1>2<BR>
<INPUT type=radio value=1 name=Q1>1<BR>
<INPUT type=radio value=-1 name=Q1>-1<BR>
<INPUT type=radio value=-2 name=Q1>-2<BR>

<H4>Second Set</H4>

<INPUT type=radio value=2 name=Q2>2<BR>
<INPUT type=radio value=1 name=Q2>1<BR>
<INPUT type=radio value=-1 name=Q2>-1<BR>
<INPUT type=radio value=-2 name=Q2>-2<BR>
<BR>
<INPUT onclick=process() type=button value=Add>
<BR></FORM></BODY></HTML>[/HTML]

The result should come out as the arithmetic addition of the values of the

radio buttons, right? But its giving me the result of concatenation operation.

Am I missing a code/command? Thanks for the help

Feb 27 '08 #1

Subscribe Post Reply

1992

ronverdonk

4,258

Expert 4TB

Next time you better enclose any code within the appropriate code tags! See the Posting Guidelines.

The writeln does no addition, it just echoes strings. Calculate the total and write that, e.g.[html]var total=parseInt(Num1)+parseInt(Num2);[/html]Then write 'total' to the screen.

Ronald

Feb 27 '08 #2

norbit

Sorry about the messy first post, Ronald...
And thanks for the helpful reply, it worked..

I also found out that this can also work:

Expand|Select|Wrap|Line Numbers

document.write("The sum is " + (parseInt(Num1) + parseInt(Num2)));

thank again :)

Feb 28 '08 #3

ronverdonk

4,258

Expert 4TB

You are welcome. See you next time.

Ronald

Feb 28 '08 #4

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Need help with Javascript radio buttons (values)

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