Knowing the text selected using mouse in javascript

I my application i want to make the text seleected selected using mouse bold..How to do this using javascript? Also how to know the cursor position using javascript...For example ,i may need to insert a text using my function just before the text where cursor is placed

Solution

You can do this in a textarea:

<html>
<head>

<title>onselect test</title>

<script type="text/javascript">

window.onselect = selectText;

function selectText(e)
{
    start = e.target.selectionStart;
    end = e.target.selectionEnd;
    alert(e.target.value.substring(start, end));
}
</script>
</head>

<body>
<textarea>
Highlight some of this text
with the mouse pointer
to fire the onselect event.
</textarea>
</body>
</html>