Javascript Prompt Box

Prompt Box

A prompt box is often used if you want the user to input a value before entering a page. When a prompt box pops up, the user will have to click either “OK” or “Cancel” to proceed after entering an input value. If the user clicks “OK” the box returns the input value. If the user clicks “Cancel” the box returns null.

Syntax

prompt(“sometext”,”defaultvalue”);

This window object provides the prompt method, which allows you to display a dialog box containing a text message followed by a text field, where the user can provide some input before closing the dialog box.

Example:

<html>
<head>
<script type="text/javascript">
function show_prompt()
{
var name=prompt("Please enter your name","Harry Potter");
if (name!=null && name!="")
  {
  document.write("Hello " + name + "! How are you today?");
  }
}
</script>
</head>
<body>

<input type="button" onclick="show_prompt()" value="Show prompt box" />

</body>
</html>

OUTPUT:


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