Re: Decoded Personalized Google code - function SetClassStyle( clazz, style, value)

"Aaron Gray" <ang.usenet@gmail.com> wrote in message
news:3u3njpFvept8U1@individual.net...
> Well I have gone and done it, got to the bottom of it.
>
> Nothing spectacular but its good to see how it is done.
>
> Now to distill the brew ...

First up 'SetClassStyle()' :-

//
// SetClassStyle() - Sets a classes style to a value
//
// Works pre stylesheet by setting the style of all elements of the
particular class.
//

function SetClassStyle( clazz, style, value)
{
  if (document.styleSheets)
  {
    clazz = "." + clazz;

    for( var styleSheetNo = 0; styleSheetNo < document.styleSheets.length;
styleSheetNo++)
    {
      var styleSheet = document.styleSheets[styleSheetNo];
      var rules = styleSheet.rules | styleSheet.cssRules;

      if (!rules) return; // err ???

      for ( var rule = 0; rule < rules.length; rule++)
        if ( rules[rule].selectorText.toLowerCase() == clazz)
          rules[rule].style[style] = value;
    }
  }
  else // No stylesheet
  {
    var all = getElementByTagName("*");

    for ( var element = 0; element < all.length; element++)
      if ( all[element].className == clazz)
        all[element].style[style] = value;
  }
}

Anyone enlighten me on the cop out return statement, 'err ???'.

Should it stay or should it go. Or what ?

Aaron
Received on Mon Nov 21 03:32:37 2005