Get js functions currentStyle(IE), defaultView(FF)_javascript tips for styles in css style sheets

function getStyle(elem, name) {
//If the attribute exists in style[ ], then it has been set recently (and is the current one)
if (elem.style[name])
return elem.style[name];
//Otherwise, try the IE method
else if (elem.currentStyle)
return elem.currentStyle[name];
//Or W3C method, if it exists
else if (document.defaultView && document.defaultView.getComputedStyle) {
//It uses the traditional "text-Align" style rule writing method instead of "textAlign"
name = name.replace(/([A-Z])/g,"-$1");
name = name.toLowerCase();
//Get the style object and get the value of the attribute (if it exists)
var s = document.defaultView.getComputedStyle(elem,"");
return s && s.getPropertyValue(name);
//Otherwise, you are using another browser
} else
return null;
}