Question

Cannot add a style to a body tag using JavaScript if FireFox detected

Asked by: mike99c

Hello,
I have a website which has a background tile image. However, I need to change the background tile image if the browser is Firefox.

Hence for IE the body tag is:
<body>

But for Firefox it must be:
<body style='background-image:url(/images/common/main_bg.gif)'>

I have attached a code snippet in which I successfully use JavaScript to detect if the browser is Firefox. However, when I view the site in Firefox the whole page simply displays:
style='background-image:url(/images/common/main_bg.gif)'

and that's it, just that line of code and nothing else. It works fine in IE.


<script type="text/javascript">
function checkfirefox(){
	if (navigator.userAgent.indexOf("Firefox")!=-1)
	document.write("style='background-image:url(/images/common/main_bg.gif)'")
}
</script>
<body onload="checkfirefox()">

                                  
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Asked On
2008-11-09 at 06:14:07ID23888917
Topics

JavaScript

,

Cascading Style Sheets (CSS)

,

Dynamic HTML (DHTML)

Participating Experts
1
Points
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Comments
6

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Answers

 

by: silemonePosted on 2008-11-09 at 06:57:59ID: 22916477

try using this script or any other standard browser javascript to see if it works...

if not, then there may be an error with your styles.

 

by: silemonePosted on 2008-11-09 at 06:58:04ID: 22916479

 

by: silemonePosted on 2008-11-09 at 07:03:38ID: 22916503

also,

looking at the script code you're writing:

try:

 document.body.style.background =

finally what errors are you getting...is the path correct?

 

by: mike99cPosted on 2008-11-09 at 07:10:16ID: 22916526

In response to the 3 preceding reponses:

1. I have checked the styles by manually embedding them and ite work. So I have ruled out any issue with the style.

2. I have looked at the quirksmode link but I have no issue detecting the browser, it is simply embedding the css that is the problem.

3. I have checked the path by embedding the style so that is not the issue either.

 

by: silemonePosted on 2008-11-09 at 07:35:23ID: 22916606

you're embedding style, but for what element?  what i mean is where is that code going to be placed?  that's why I said explicitedly set


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<script type="text/javascript">
function checkfirefox(){
        if (navigator.userAgent.indexOf("Firefox")!=-1)
       {
               document.body.style.background = url(/images/common/main_bg.gif);
        }
}
</script>
<body onload="checkfirefox()">

 

by: mike99cPosted on 2008-11-09 at 07:48:05ID: 22916655

Hello,
I am found a solution but have come up with a different approach.
I have placed the style change in a separate style sheet and used JavaScript to only include the style sheet for Firefox.
I have attached the code snipet.

<script type="text/javascript">
	if (navigator.userAgent.indexOf("Firefox")!=-1)
	document.write("<link rel='stylesheet' href='/css/sitestyles-firefox.css' type='text/css' media='all' />")
</script>
                                              
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