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    <p>Ok, it sounds like you want to change the global CSS so which will effictively change all elements of a peticular style at once. I've recently learned how to do this myself from a <a href="http://www.shawnolson.net/a/503/altering-css-class-attributes-with-javascript.html" rel="noreferrer">Shawn Olson tutorial</a>. You can directly reference his code <a href="http://www.shawnolson.net/scripts/public_smo_scripts.js" rel="noreferrer">here</a>.</p> <p>Here is the summary:</p> <p>You can retrieve the <a href="https://developer.mozilla.org/En/DOM/Stylesheet" rel="noreferrer">stylesheets</a> via <code>document.styleSheets</code>. This will actually return an array of all the stylesheets in your page, but you can tell which one you are on via the <code>document.styleSheets[styleIndex].href</code> property. Once you have found the stylesheet you want to edit, you need to get the array of rules. This is called "rules" in IE and "cssRules" in most other browsers. The way to tell what <a href="https://developer.mozilla.org/en/DOM/cssRule#CSSStyleRule" rel="noreferrer">CSSRule</a> you are on is by the <code>selectorText</code> property. The working code looks something like this:</p> <pre><code>var cssRuleCode = document.all ? 'rules' : 'cssRules'; //account for IE and FF var rule = document.styleSheets[styleIndex][cssRuleCode][ruleIndex]; var selector = rule.selectorText; //maybe '#tId' var value = rule.value; //both selectorText and value are settable. </code></pre> <p>Let me know how this works for ya, and please comment if you see any errors.</p>
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    1. USLuis Perez
    1. USMike
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    1. COChanging CSS this way is *much* faster if you have 100s+ elements. Say for instance, changing all the cells in a certain part of a table at once.
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      1. USEdH
    2. COI can't find `rule.value` in FF 20. There is `rule.style` however, which is settable and behaves like `element.style`. Cf. [https://developer.mozilla.org/en-US/docs/DOM/CSSStyleRule](https://developer.mozilla.org/en-US/docs/DOM/CSSStyleRule). Checking for `rule.type == rule.STYLE_RULE` might also be a good idea before accessing `rule.selectorText`.
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      1. USChristian Aichinger
 

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