`TYPE = BUTTON`

BUTTON defines a button which causes a script to run. Use the onClick attribute to give the script command(s). BUTTON is used only with scripting. Browsers that don't understand scripts don't understand this type of input and usually render it as a text input field.

<FORM>
<TABLE BORDER CELLPADDING=3>
<TR>
    <TD><NOBR>radius: <INPUT NAME="Circle_radius" SIZE=4></NOBR></TD>
    <TD><INPUT TYPE=BUTTON OnClick="Circle_calc(this.form);" VALUE="calculate"></TD>
    <TD ALIGN=RIGHT BGCOLOR="#AACCFF">
    <NOBR>circumference: <INPUT NAME="Circle_circumference" SIZE=9></NOBR><BR>
    <NOBR>area: <INPUT NAME="Circle_area" SIZE=9></NOBR></TD>
    </TR>
</TABLE>
</FORM>

gives us