Cross-browser caret position

jquery.caret.js

/*
* jQuery caret Plugin 0.2
*
* Tested in jQuery 1.4.2
*
* Copyright 2010, Rowan Manning (http://www.rowanmanning.co.uk/)
* Dual licensed under the MIT or GPL Version 2 licenses
*/
(function($){
//============================================================
// caret position functions

// get the caret position of an element
$.getCaretPosition = function(elem){
	
	// get the element
	var $elem = $(elem);
	
	// default caret position
	var caretPosition = 0;
	
	// ie way of doing things
	if (document.selection){
		
		// set focus on the element
		$elem.focus();
		
		// get empty selection range
		var selection = document.selection.createRange();
		
		// move selection start to 0 position
		selection.moveStart('character', -$elem.val().length);
		
		// the caret position is selection length
		caretPosition = selection.text.length;
		
		}
		
	// proper way of doing things
	else if (elem.selectionStart || elem.selectionStart=='0'){
		
		// the caret position is a lot easier to determine
		caretPosition = elem.selectionStart;
		
		}
	
	// return the caret position
	return caretPosition;
	
	}

// set the caret position of an element
$.setCaretPosition = function(elem, caretPosition){
	
	// TODO write this
	
	}

//============================================================
// caret position methods

// get/set the caret position of an element
$.fn.caret = function(caretPosition){
	
	// is caretPosition is a number?
	if ((caretPosition-0)==caretPosition && caretPosition.length>0){
		
		// set the caret position
		$.setCaretPosition(this[0], caretPosition);
		
		// return original object for chaining
		return this;
		
		}
	else{
		
		// get the caret position
		return $.getCaretPosition(this[0]);
		
		}
	
	}

//============================================================
}(jQuery));

jquery.caret.min.js

/*
* jQuery getCaretPosition Plugin 0.2
*
* Tested in jQuery 1.4.2
*
* Copyright 2010, Rowan Manning (http://www.rowanmanning.co.uk/)
* Dual licensed under the MIT or GPL Version 2 licenses
*/
(function(b){b.getCaretPosition=function(a){var d=b(a),c=0;if(document.selection){d.focus();a=document.selection.createRange();a.moveStart("character",-d.val().length);c=a.text.length}else if(a.selectionStart||a.selectionStart=="0")c=a.selectionStart;return c};b.setCaretPosition=function(){};b.fn.caret=function(a){if(a-0==a&&a.length>0){b.setCaretPosition(this[0],a);return this}else return b.getCaretPosition(this[0])}})(jQuery);