gistfile1.js

function anchorify(text) {
	var URIregex=/\b(?:(?:ht|f)tp(?:s?)\:\/\/|~\/|\/)?(?:\w+:\w+@)?(?:(?:[-\w]+\.)+(?:com|org|net|gov|mil|biz|info|mobi|name|aero|jobs|museum|travel|[a-z]{2}))(?::[\d]{1,5})?(?:(?:(?:\/(?:[-\w~!$+|.,=]|%[a-f\d]{2})+)+|\/)+|\?|#)?(?:(?:\?(?:[-\w~!$+|.,*:]|%[a-f\d{2}])+=?(?:[-\w~!$+|.,*:=]|%[a-f\d]{2})*)(?:&(?:[-\w~!$+|.,*:]|%[a-f\d{2}])+=?(?:[-\w~!$+|.,*:=]|%[a-f\d]{2})*)*)*(?:#(?:[-\w~!$+|.,*:=]|%[a-f\d]{2})*)?\b/g;
	var returnArray=[];
	while (true) {
		var previousLastIndex=URIregex.lastIndex;
		var URImatch=URIregex.exec(text);
		if (URImatch == null) {
			returnArray.push(text.substr(previousLastIndex,text.length-previousLastIndex));
			return returnArray;
		}
		returnArray.push(text.substr(previousLastIndex,URImatch.index-previousLastIndex));
		if (text.substr(URImatch.index-1,1) == '@') {
			returnArray.push(URImatch[0]);
		}
		else {
			var newURI=(URImatch[0].substr(0,6) == 'ftp://' || URImatch[0].substr(0,7) == 'http://' || URImatch[0].substr(0,8) == 'https://') ? URImatch[0] : 'http://' + URImatch[0];
			var newAnchor=new Element('a',{href:newURI,style:'text-decoration:underline;'});
			newAnchor.appendChild(document.createTextNode(URImatch[0]));
			returnArray.push(newAnchor);
		}
	}
}