[thelist] Formatting On The Fly

Ben Henick persist1 at io.com
Thu Mar 8 13:53:21 CST 2001

On Thu, 8 Mar 2001, Salvatore Palmisano wrote:

> Is it possible to apply text formatting on the fly, based on a user's mouse
> click?
> I have a series of radio buttons, and Id like when one is clicked on to set
> some text to red, and when the other is clicked, the same text to black.
> Is this JS?  DHTML?  I have the CSS classes in place, but am at a loss about
> how to call them client-side.
> Thanks all.

Technically, it's DTHML.  Where the block-level element containing the
text you want to change is called 'ThatBlock':


document.all["ThatBlock"].style.color = "#ff0000";


document.all["ThatBlock"].style.color = "#000000";

W3C Clumsy:

ChangeIt = document.getElementById("ThatBlock");
ChangeIt.style.color = "#ff0000";
// and so forth

You can substitute the color codes with local variable names and put the
scripting inside of a function that supplies the color codes as arguments:


This is a generally clumsy example, but should be adequate as a starting
point.  Something else I should point out is that changing a single style
attribute will not reset the other style values for that element, though
the change *can* be expected to cascade where appropriate.

...And because I've never written anything to swap out entire classes, I
can't be much help on the exact syntax for that approach (unless I spend
20 minutes at MSDN when I should be back in bed nursing my cold).

Ben Henick
Web Author At-Large
persist1 at io.com

"Are you pondering what I'm pondering, Pinky?"
"I think so, Brain, but... (snort) no, no, it's too stupid."
"We will disguise ourselves as a cow."
"Oh!" (giggles) "That was it exactly!"

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