use the onchange event on the SELECT element.

At 20:33 05/08/02 +0000, you wrote:
>dear all
>
>I have a drop down box in my html page i.e select tag . and I want to
>disply an alert when a click just only one item from many options inside
>the select tag . what can I write to implement this function
>
>
>  thanks
>
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