FAQ Topic - I have <a href="javascript:somefunction()"> what ... ? (2009-11-20)
FAQ server
FAQ Topic - I have <a href="javascript:somefunction()"> what
... ?
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Whatever the rest of your question, this is generally a very bad idea.
The ` javascript: ` pseudo protocol was designed to replace the
current document with the value that is returned from the expression.
For example:
<a href="javascript:'<h1>' + document.lastModified + '</h1>'">lastModified</a>
will result in replacing the current document with the value
returned from ` document.lastModified `, wrapped in an ` <h1> `
tag.
When the expression used evaluates to an ` undefined ` value
(as some function calls do), the contents of the current page are not
replaced. Regardless, some browsers (notably IE6) interpret this as
navigation and will enter into a 'navigation' state where GIF
animations and image swaps will stop working.
It is also possible for IE to be configured such that it supports
javascript but not the ` javascript: ` protocol. This results
in the user seeing a protocol error for ` javascript: ` URIs.
The ` javascript: ` pseudo protocol creates accessibility and
usability problems in user agents that do not support javascript, or
have javascript disabled. It provides no fallback for when the script
is not supported.
Instead, use
` <a href="something.html" onclick="somefunction();return false"> `
where ` something.html ` is a meaningful alternative. Alternatively,
attach the ` click ` callback using an event registry.
http://www.useit.com/alertbox/20021223.html
The complete comp.lang.javascript FAQ is at
http://jibbering.com/faq/
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