disabling a textfield

[phphelp]

hi
i want to disable a textfield when a user selects a perticular value form select filed.
e.g i m having occupations in select field and when user selects 'others' the textfield should not be disable and disable for all other values.

[Bobbi]

That's a javascript issue (if you don't want to reload the whole page with PHP - then you can use the "READONLY" tag inside the <input> field) ... if my memory about javascript doesn't serve me wrong, you can do that with something like

onclick="document.form.textbox.disabled=true"

in the <option> tags.

[battra]

<form>
<select name="occupation" onChange="toggleInput(this.options[this.selectedIndex].value, this.form.other_occupation)">
<option value="something">Something</option>
<option value="other">Other</option>
</select>
Please specify: <input type="text" name="other_occupation">
</form>

<script language="JavaScript">
function toggleInput(selected_value, input_box)
{
    input_box.disabled = (selected_value != 'other');
    input_box.readonly = (selected_value != 'other');
}
</script>