Javascript Guide
More With Forms

Checkboxes

Checkboxes are square boxes which can be clicked on or off. The following HTML produces a checkbox.

<input type="checkbox" name="myCheckBox">

You find out whether a checkbox is clicked by using the following command.

if(document.myForm.myCheckBox.checked) {
code to run
}

Radio Buttons

Radio buttons are groups of circular buttons of which only one can be selected. The following HTML produces a pair of radio buttons.

<input type = "radio" name="radio1">
<input type = "radio" name="radio1">

You find out whether a radio button is clicked by using the following command.

if(document.myForm.radio1[0].checked) {
code to run
}

This checks to see if the first option has been clicked. You would need to include an if to check the second option.