[TYPO3] mailformplus - can't figure out where does the inline style for required fields comes from

[Vlatko Surlan]

Hi all. I use typo3 4.0.2 with mailformplus 3.9.0. When I view the 
contact form in my firefox 2.0.0.1 with webdeveloper extension I can see 
that some input fields have yellow background even though I've set them 
to another color via external css. I've managed to trace this to 
generated inline css. I've done it be first viewing the source in 
firefox (ctrl+u) and comparing that to 'view generated source'.

In view source, input field for name looks like this:
<tr>
	<td valign="top">Name </td>
	<td valign="top"><input class="input1" type="text" name="name" 
value=""></td>
</tr>

In view generated source, input field for name looks like this:
<tr>
	<td valign="top">Name </td>
	<td valign="top"><input style="background-color: rgb(255, 255, 160);" 
class="input1" name="name" value="" type="text"></td>
</tr>

So I figured that the style="background-color: rgb(255, 255, 160);" gets 
added by JavaScript. But when I go to Information->View JavaScript all I 
get is this:

var browserName = navigator.appName;
		var browserVer = parseInt(navigator.appVersion);
		var version = "";
		var msie4 = (browserName == "Microsoft Internet Explorer" && 
browserVer >= 4);
		if ((browserName == "Netscape" && browserVer >= 3) || msie4 || 
browserName=="Konqueror" || browserName=="Opera") {version = "n3";} else 
{version = "n2";}
			// Blurring links:
		function blurLink(theObject)	{	//
			if (msie4)	{theObject.blur();}
		}

I cannot figure out what adds those inline syles 
(style="background-color: rgb(255, 255, 160);") for the required fields 
or how to turn it off.