function getCompStyle(obj, styleProp) {
	var cs, prop = 'undefined';
	if(document.defaultView && document.defaultView.getComputedStyle) {
		cs = document.defaultView.getComputedStyle(obj, '');
		if (cs) { prop = cs.getPropertyValue(styleProp); }
	} else if(obj.currentStyle) {
		var propName = styleProp.split('-');
		styleProp = propName[0];
		for (var i=1; i<propName.length; ++i) {
			var ch = propName[i].charAt(0);
			styleProp += propName[i].replace(ch, ch.toUpperCase());
		}
		prop = obj.currentStyle[styleProp];
	} else { return null; }
	return prop;
}