var twitter_enable = true;
function toggleTwitter(callback) {
	for (var i=0; i<document.styleSheets.length; i++) {
         	var cssSheet = document.styleSheets[i]
         	var pattern = /twitter.css/i;
         	if (cssSheet.href.match(pattern)) {
         		cssSheet.disabled = twitter_enable;
         		if (twitter_enable == true) {
         			twitter_enable = false;
         		} else {
         			twitter_enable = true;
         		}
         		if (callback != null) {
         			window[callback]();
         		}
         		return;	
         	}
    }
}