alert on textbox focus

i need to have an alert window popup when a user clicks in a textbox on a page.. how do i do this.

t3ssavAsked:
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rdivilbissCommented:
<input type="text" onclick="javascript:alert('Message');">
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rdivilbissCommented:
In your question title you said focus and not click.  In that case:

<input type="text" onfocus="javascript:alert('Message');">

However that will be very annoying.
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rdivilbissCommented:
<script type="text/javascript">
var messageShown = false;

function focusMessage() {
    if (!messageShown) {
           alert('Message');
           messageShown = true;
    }
}
</script>

<input type="text" onfocus="focusMessage()">

Would be better as it only will show the message once per page load.

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t3ssavAuthor Commented:
the requirement for the project is that when they focus the text box.. every time they focus it it has to popup a disclaimer...
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rdivilbissCommented:
Build what they want but I wouldn't be surprised if they later changed their mind.
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