jQuery.fn.numeric = function(decimal, allowPaste)
{
	decimal = decimal || ".";
	allowPaste = typeof allowPaste == "boolean" ? allowPaste : true;
	this.keypress(
		function(e)
		{
			var key = e.charCode ? e.charCode : e.keyCode ? e.keyCode : 0;
			if(key == 13 && this.nodeName.toLowerCase() == "input")
			{
				return true;
			}
			else if(key == 13)
			{
				return false;
			}
			var allow = false;
			if((e.ctrlKey && key == 97 ) || (e.ctrlKey && key == 65) ) return true;
			if((e.ctrlKey && key == 120 ) || (e.ctrlKey && key == 88) ) return true;
			if((e.ctrlKey && key == 99 ) || (e.ctrlKey && key == 67) ) return true;
			if((e.ctrlKey && key == 122 ) || (e.ctrlKey && key == 90) ) return true;
			if((e.ctrlKey && key == 118 ) || (e.ctrlKey && key == 86) 
			|| (e.shiftKey && key == 45))
			{
				if(allowPaste) return true;
				else return false;
			}
			if(key < 48 || key > 57)
			{
				if(key == decimal.charCodeAt(0) && this.value.indexOf(decimal) != -1)
				{
					allow = false;
				}
				if(
					key != 8  &&
					key != 9  &&
					key != 13 &&
					key != 35 &&
					key != 36 &&
					key != 37 &&
					key != 39 &&
					key != 46 
				)
				{
					allow = false;
				}
				else
				{
					if(typeof e.charCode != "undefined")
					{
						if(e.keyCode == e.which && e.which != 0)
						{
							allow = true;
						}
						else if(e.keyCode != 0 && e.charCode == 0 && e.which == 0)
						{
							allow = true;
						}
					}
				}
				if(key == decimal.charCodeAt(0) && this.value.indexOf(decimal) == -1)
				{
				}
			}
			else
			{
				allow = true;
			}
			return allow;
		}
	)
	.bind("paste", function(){return allowPaste});
	return this;
}