Text Selection help (bbcode function)

[micmania1]

Hi, I'm trying to create a bbcode function with functionality similar to that of which is used on this site.

 

Here's my function:

function bbCode(code) { 
var text = "";
var e = 'message'; // ID

if (document.all) {
	text = document.selection.createRange().text; 
} else {
	text = document.getSelection();
}

if (text != '') { // text must be highlighted
	// Set new highlighted value
	if (document.all) { 
		document.selection.createRange().text = '[' + code + ']' + text + '[/' + code + ']';
	} else {
		var setVal = document.getSelection() = '[' + code + ']' + text + '[/' + code + ']';
	}
} else {
	document.getElementById(e).innerHTML = document.getElementById(e).innerHTML + '[' + code + '][/' + code + ']';
}
}

 

The problem i'm having is detecting where the selected text is from. For example I could highlight the footer of my website which has no relation to the bbcode function, but when the 'bold' tag is clicked, it will wrap the footer in bold tags or any text on that page which I select.

 

Could somebody tell me how I can detect where the selected text is?

 

Thanks for your time.

Michael

[JasonLewis]

I'm sure SMF wouldn't mind you taking a look at their code, since it is Open Source. Just make sure you don't remove any copyright notices that may be present if you intend on using some of their JS.