diff --git a/numeric/jquery.numeric.js b/numeric/jquery.numeric.js
index 0b179d2..7477772 100644
--- a/numeric/jquery.numeric.js
+++ b/numeric/jquery.numeric.js
@@ -3,7 +3,7 @@
  * Copyright (c) 2006-2010 Sam Collett (http://www.texotela.co.uk)
  * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
  * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
- * 
+ *
  * Version 1.2
  * Demo: http://www.texotela.co.uk/code/jquery/numeric/
  *
@@ -59,7 +59,7 @@ $.fn.numeric.keypress = function(e)
 	if(key < 48 || key > 57)
 	{
 		/* '-' only allowed at start */
-		if(key == 45 && this.value.length == 0) return true;
+		if(key == 45 && (this.value.length == 0 || (this.selectionEnd - this.selectionStart) == this.value.length)) return true;
 		/* only one decimal separator allowed */
 		if(decimal && key == decimal.charCodeAt(0) && this.value.indexOf(decimal) != -1)
 		{
@@ -126,7 +126,7 @@ $.fn.numeric.blur = function()
 	var val = $(this).val();
 	if(val != "")
 	{
-		var re = new RegExp("^\\d+$|\\d*" + decimal + "\\d+");
+		var re = new RegExp("^-?\\d+$|\\d*" + decimal + "\\d+");
 		if(!re.exec(val))
 		{
 			callback.apply(this);
@@ -139,4 +139,4 @@ $.fn.removeNumeric = function()
 	return this.data("numeric.decimal", null).data("numeric.callback", null).unbind("keypress", $.fn.numeric.keypress).unbind("blur", $.fn.numeric.blur);
 }
 
-})(jQuery);
\ No newline at end of file
+})(jQuery);