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<p>From <b>http://www.w3schools.com</b> (Copyright Refsnes Data)</p>
<h1>JavaScript Popup Boxes</h1>
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<p class="intro">In JavaScript we can create three kinds of popup boxes: Alert
box, Confirm box, and Prompt box.</p>
<hr />
<h2>Examples</h2>
<p><a target="_blank" href="tryit.asp@filename=tryjs_alert">Alert box</a></p>
<p><a target="_blank" href="tryit.asp@filename=tryjs_alert2">Alert box with line breaks</a></p>
<p><a target="_blank" href="tryit.asp@filename=tryjs_confirm">Confirm box</a></p>
<p><a target="_blank" href="tryit.asp@filename=tryjs_prompt">Prompt box</a></p>
<hr />
<h2>Alert Box</h2>
<p>An alert box is often used if you want to make sure information comes through
to the user.</p>
<p>When an alert box pops up, the user will have to click "OK" to proceed. </p>
<p><b>Syntax:</b></p>
<table class="ex" cellspacing="0" border="1" width="100%" id="table1"><tr><td>
<pre>alert("sometext");</pre>
</td></tr></table>
<br />
<hr />
<h2>Confirm Box</h2>
<p>A confirm box is often used if you want the user to verify or accept
something.</p>
<p>When a confirm box pops up, the user will have to click either "OK" or
"Cancel" to proceed. </p>
<p>If the user clicks "OK", the box returns true. If the user clicks "Cancel", the box returns false.</p>
<p><b>Syntax:</b></p>
<table class="ex" cellspacing="0" border="1" width="100%" id="table2"><tr><td>
<pre>confirm("sometext");</pre>
</td></tr></table>
<br />
<hr />
<h2>Prompt Box</h2>
<p>A prompt box is often used if you want the user to input a value before
entering a page.</p>
<p>When a prompt box pops up, the user will have to click either "OK" or
"Cancel" to proceed after entering an input value. </p>
<p>If the user clicks "OK" the box returns the input value. If the user clicks "Cancel" the box returns null.</p>
<p><b>Syntax:</b></p>
<table class="ex" cellspacing="0" border="1" width="100%" id="table3"><tr><td>
<pre>prompt("sometext","defaultvalue");</pre>
</td></tr></table>
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<p>From <b>http://www.w3schools.com</b> (Copyright Refsnes Data)</p>
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