javascript: Restrict all number inputs to use only digits, commas, periods

dollar-input.js

// Restrict all number inputs to use only digits, commas, periods
// Useful dollar amounts
$('input').bind('keypress', function(e){
	var charCode = (e.which) ? e.which : e.keyCode
	if (charCode === 44 || charCode === 46){
		return true;
	}else if ( charCode > 31 && (charCode < 48 || charCode > 57) ){
		return false;
	}
	return true;
});

Number.prototype.formatMoney.js

Number.prototype.formatMoney = function(c, d, t){
	var 
		n = this, 
		c = isNaN(c = Math.abs(c)) ? 2 : c, 
		d = d == undefined ? "," : d, 
		t = t == undefined ? "." : t, 
		s = n < 0 ? "-" : "", 
		i = parseInt(n = Math.abs(+n || 0).toFixed(c)) + "", 
		j = (j = i.length) > 3 ? j % 3 : 0;		
	return s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
};