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Editorial Team
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Asked: 2026-05-20T10:06:08+00:00

<div align=right style=border:1 #FF0 solid; background-color:#999 onMouseOver=javascript: function(){this.style.backgroundColor = ‘#DDD’;} onMouseOut=javascript: function(){this.style.backgroundColor = ‘#999’;}>

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<div align="right" style="border:1 #FF0 solid; background-color:#999" onMouseOver="javascript: function(){this.style.backgroundColor = '#DDD';}" onMouseOut="javascript: function(){this.style.backgroundColor = '#999';}">
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</div>

When mouseover event triggered it gives this error:

Uncaught SyntaxError: Unexpected
token (

What should I do? I want to define a function inside onMouseOver and onMouseOut

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1 Answer

  1. Editorial Team

    Don’t use function declaration, just do:

    onMouseOver = "this.style.backgroundColor = '#DDD';"

    And:

    onMouseOut = "this.style.backgroundColor = '#999';"

    By the way, you should consider unobstrusive javascript.

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