Select HTML Text With JavaScript
<!-- FROM: http://us5.campaign-archive1.com/?u=ea228d7061e8bbfa8639666ad&id=c53c1e7832&e=ff0570c0b6 -->
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JS Bin</title>
</head>
<body>
<input value="Web Tools Weekly" id="textField">
<button id="btn">Select Text</button>
<script>
var tf = document.getElementById('textField'),
btn = document.getElementById('btn');
btn.onclick = function () {
// change the numbers to select a different range
tf.focus();
tf.setSelectionRange(5, 9);
};
</script>
</body>
</html>