Third-Party JavaScript version 8: Listing 3.6: Finding the value of an element's style property

getStyle.js

function getStyle(node, property, camel) {
    var value;
    if (window.getComputedStyle) {
        value = document.defaultView
            .getComputedStyle(node, null)
            .getPropertyValue(property);
    } else if (node.currentStyle) {
        value = node.currentStyle[property] ?
            node.currentStyle[property] :
            node.currentStyle[camel];
    }
    if (value === 'transparent' || 
        value === '' ||
        value == 'rgba(0, 0, 0, 0)')
    {
        return getStyle(node.parentNode, property, camel);
    } else {
        return value || '';
    }
}