js regex match

HTML

<input id="totest" value="1213sl4544" />
<button onclick="match()">Match</button>

JavaScript

function match() {
	var matches = document.getElementById("totest").value.match(/(\d+)sl(\d+)/);
	alert("original regex, must meet all criteria " + matches[0]);
  alert("now we can get match sets first match set (first parens) " + matches[1]);
  alert("now the second match set (second parens)  " + matches[2]);
}