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In a JS function, I've set the background color of a text field like this:
document.getElementsByName(formId)[0].title.style.backgroundColor = "#7FB75E";
In another function, I want to reset the background color to the default value defined in my style sheet. How can I do this?
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Use the initial keyword to set a property to its initial value. Use the inherit keyword to make an element's property the same as its parent. Use the revert keyword to reset a property to the value established by the user-agent stylesheet (or by user styles, if any exist).
In short, there's no easy way to restore to default values to whatever a browser uses . The closest option is to use the 'initial' property value, which will restore it to the default CSS values, rather than the browser's default styles.
In order to change a style property of an element, change the value associated with the property under the "style" argument of the element. Let's continue with our button example from the last section: <input type="button" id="myButton" value="I'm a button!">
The HTML DOM allows JavaScript to change the style of HTML elements.
Just set the value on the "style" object to the empty string.
document.getElementsByName(formId)[0].title.style.backgroundColor = "";
edit — note that if your element had an inline style, you'd have to explicitly save that somewhere or else you won't be able to get it back.
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