onkeypress (HTML attribute)

Depr. Version
Browser support (more…)
IE5.5+ FF1+ SA1.3+ OP9.2+
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The onkeypress event handler captures a completed key-press-and-release sequence (equivalent to onkeydown followed by onkeyup) while the element to which the attribute is applied has focus.

Note that this event attribute cannot be applied to the following elements:

  • applet
  • base
  • basefont
  • bdo
  • br
  • font
  • frame
  • frameset
  • head
  • html
  • iframe
  • isindex
  • meta
  • param
  • script
  • style
  • title


In the example below, the onkeypress attribute triggers a piece of JavaScript that runs some kind of availability check, such as one to ensure that as each letter is typed, the user is provided with feedback.

<input type="text" onkeypress="checkAvailability();"  name="domain_name"


This attribute has no fixed value. It’s up to the author to decide on the scripting that’s included here, be that a call to one or more defined functions, or a simple alert() statement.


Internet Explorer Firefox Safari Opera
5.5 6.0 7.0 1.0 1.5 2.0 1.3 2.0 3.0 9.2 9.5
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Every browser listed supports this attribute. However, inline event handlers such as this should be avoided. In the same way that inline CSS styles are frowned upon but externally defined CSS styles are considered good practice, inline event handlers should be stripped out and replaced with events attached unobtrusively through the DOM.

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