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JavaScript dialog box use method (Warning box JavaScript confirmation box Prompt box) _ Basics

Source: Internet
Author: User
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1. Warning Box

Warning boxes are often used to ensure that users can get certain information.

When the warning box appears, the user needs to click on the OK button to continue the operation.

Grammar:

Copy Code code as follows:

Alert ("Text")

2. Confirmation Box

The confirmation box is used to enable users to authenticate or accept certain information.

When the confirmation box appears, the user needs to click OK or Cancel button to continue the operation.

If the user clicks Confirm, then the return value is true. If the user clicks Cancel, the return value is false.

Grammar:

Copy Code code as follows:

Confirm ("text")

3. Cue box

A prompt box is often used to prompt the user to enter a value before entering the page.

When the prompt box appears, the user needs to enter a value and then click the Confirm or Cancel button to continue manipulating.

If the user clicks Confirm, the return value is the value entered. If the user clicks Cancel, the return value is null.

Grammar:

Copy Code code as follows:

Prompt ("text", "Default value")

Instance:

Copy Code code as follows:

<body>
<script type= "Text/javascript" >
var option=confirm ("Choose option?"); /true,false
alert (option);
var poption=prompt ("Right,this?"); /null or other
alert (poption);
</script>
</body>

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Related Keywords:
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