function isNumeric(value) {
	return typeof value != "boolean" && value !== null && !isNaN(+ value);
}

function formatCurrency(num) {
	num = num.toString().replace(/\$|\,/g,'');
	if(isNaN(num))
		num = "0";
	sign = (num == (num = Math.abs(num)));
	num = Math.floor(num*100+0.50000000001);
	cents = num%100;
	num = Math.floor(num/100).toString();
	if(cents<10)
		cents = "0" + cents;
	for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
		num = num.substring(0,num.length-(4*i+3))+','+num.substring(num.length-(4*i+3));
	return (((sign)?'':'-') + num + '.' + cents);
}

function numberOnly(inputObj,wholeNumbers) {
	if (wholeNumbers) 
		inputObj.value = inputObj.value.replace(/[^0-9]/g,'')
	else
		inputObj.value = inputObj.value.replace(/[^0-9.]/g,'');
	return true;
}

function clearPrompt(inputName,newValue) {
	document.getElementById(inputName).value = newValue;
}