The event attribute onkeypress that is triggered when the user presses a key (on the keyboard) in html

Example

Execute a piece of JavaScript when the user presses a key:

<input type="text" onkeypress="displayResult()">

Browser support

IE

Firefox

Chrome

Safari

Opera

All major browsers support the onkeypress attribute.

Definition and Usage

The onkeypress property is triggered when the user presses a key (on the keyboard).

Tip: The order of events relative to the onkeypress event:

onkeydown onkeypress onkeyup

Note: In any browser, the onkeypress event will not be triggered by all key presses (such as ALT , CTRL, SHIFT, ESC).

Note: The onkeypress attribute is not applicable to the following elements: dde6fb694e6711ae5e6f381704c04ae4, 71af07a0e88a1ac1ff73f855702ac153, 0c6dc11e160d3b678d68754cc175188a, 93f0f5c25f18dab9d176bd4f6de5d30e, 100db36a723c770d327fc0aef2ce13b1, d5ba1642137c3f32f4f4493ae923989c, e8e496c15ba93d81f6ea4fe5f55a2244, 0c68fef83818661b6da588c77ca3985e, 3f1c4e4b6b16bbbd69b2ee476dc4f83a, c9ccee2e6ea535a969eb3f532ad9fe89 or b2386ffb911b14667cb8f0f91ea547a7.

Differences between HTML 4.01 and HTML5

None.

Syntax

<element onkeypress="script">

Attribute value

Value	Description
script	Script to run when onkeypress occurs.

<input class="text" type="text" name="PAGE" size="60" maxlength="2" value="<%=bg.getPAGE()%>" onkeypress="if(event.keyCode<48 || event.keyCode>57) event.returnValue=false;">

Error report:

Multiple annotations found at this line:
- Invalid character used in text string (57) event.returnValue=false;">).
- Syntax error on token "||", ) expected
- Attribute value (if(event.keyCode<48 || ) not closed.
- Undefined attribute name (event.keyCode).

Just put greater than 57 in the front. . . Try it yourself

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