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JavaScript / DHTML / AJAX Discussion Thread
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Aug 8th, 2007

Problem with applying colors from form

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Hello,

Well I've got a bunch of Textboxes with color hex codes inside (#cccccc). Now in an IFrame on the same page I want to use these colors.
I couldn't find a solution yet, can somebody please help me.

Thanks in advance.

Last edited by sted; Aug 8th, 2007 at 6:14 pm.

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sted

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Aug 8th, 2007

Re: Problem with applying colors from form

In javascript:
- You have to read the value from the text box.
- You have to make a string with the #rrggbb value in it.
- You have to assign the value so created to the style attribute needed.

Remember that the hyphenated form does not exist in javascript. So:

"background-color" in css, becomes
"backgroundColor" in JavaScript.

The following is an example of the form prgrss with object os3, and an array of color codes colox:

JavaScript / DHTML / AJAX Syntax (Toggle Plain Text)
document.forms.prgrss.os3.style.backgroundColor = colox[cox];
document.forms.prgrss.os3.style.backgroundColor = colox[cox];

Last edited by MidiMagic; Aug 8th, 2007 at 7:52 pm.

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Re: Problem with applying colors from form

Well lets say I have something like this:

<body bgcolor="doument.form.field.value;">

Why doesent it work?

sted

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Re: Problem with applying colors from form

What you wrote doesn't work because the html is rendered before those values exist.

HTML is a passive language. It renders once, then quits.

Also, the variable you are trying to read is not available to the body tag. A tag's attributes are defined only inside that tag.

And the syntax "document.form.field.value;" is JavaScript syntax, not html or css syntax.

And it works better if you can spell "document".

Finally, the bgcolor attribute is deprecated. It will not be supported in future web language.

You must use JavaScript (or a server-side script) to do any dynamic (changeable) content.

Last edited by MidiMagic; Aug 8th, 2007 at 9:47 pm.

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