//Text to parse for RegEx:
selText = document.selection.text;

//Show matches:
vResults = findMatches(selText);
alert(vResults);


function findMatches(inputStr){
	//Build an expression to match what you want:
    //var regex = /\d\d\d\d/ig; // match 2013
    var regex = /www\..+?\..{2,3}/ig; //match www.emeditor.com
    
    //To avoid errors, check beforehand if test is successful:
	if(regex.test(inputStr)){
		//if test was ok, collect matches:
	    result= inputStr.match(regex);
	    //some cosmetic:
    	count = result.length; 
    	status = "Macro found " + count + " matches.";
    	//return result to caller:
    	return result.join("\r\n");
    }else{
    	return "No match found.";
    }
}