HTML 4 & CSS 3: required input needs custom background-color

marianhe
marianhe used Ask the Experts™
on
I need to change background color of required inputs in a form.

Following code doesn't work:

CSS
input[type="text"] .required { background-color: yellow; }

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or CSS:
input .required { background-color: yellow; }

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HTML:
<input class="required" type="text" id="email" name="email">

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Tested in browsers FF 17.0.1 and IE 9 with latest patches.
Only HTML 4 and CSS 3 is acceptable.
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just
.required { background-color: yellow; }

or you can also write :
#email { background-color: yellow; }
Fixer of Problems
Most Valuable Expert 2014
Commented:
Several variations work fine but 'input .required' with a space in the middle didn't.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
<title>CSS Input BG</title>
<style type="text/css">
<!-- 
input.required { background-color: yellow; }
.required2 { background-color: blue; }
#email3 { background-color: green; }   
-->
</style>
</head>
<body>
<h1>CSS Input BG</h1>

<form action="">
<input class="required" type="text" id="email" name="email"><br>
<input class="required2" type="text" id="email2" name="email2"><br>
<input class="required3" type="text" id="email3" name="email3"><br>
<input type="submit" value="Submit" />
</form>

</body>
</html>

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