JavaScript Dialog Box
A JavaScript dialog box is predefined function which is used to perform different task.
Some functions are used in JavaScript Dialog box.
| Function |
Description |
| alert() |
To give alert message to user |
| prompt() |
To input value from used |
| Confirm() |
To get confirmation from user before executing |
Alert()
Alert() function in JavaScript is used to give an alert message to the user.
Example
<!DOCTYPE html>
<html>
<body>
<script>
function alertmsg()
{
alert("Alert function call");
}
</script>
</body>
<form>
<input type="button" value="Click Me" onclick="alertmsg()"/>
</form>
</html>
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prompt()
Prompt function in JavaScript is used to get input from user.
Example
<!DOCTYPE html>
<html>
<body>
<script>
function alertmsg()
{
a=prompt("Enter your name:");
alert(a);
}
</script>
</body>
<form>
<input type="button" value="Click Me" onclick="alertmsg()"/>
</form>
</html>
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Confirm()
Confirm function in JavaScript is used to get confirmation from user before executing some task.
Example
<!DOCTYPE html>
<html>
<body>
<script>
function alertmsg()
{
a=prompt("Enter your name:");
confirm(a);
}
</script>
</body>
<form>
<input type="button" value="Click Me" onclick="alertmsg()"/>
</form>
</html>
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