function validateAmount(amount, min_amount){
	if(RegExp(/^\$?\d+(\.\d{2})?$/).test(String(amount.value).replace(/^\s+|\s+$/g, ""))){
	 if(amount.value*1>=min_amount.value*1){	    
		return true;}
		else{
		 alert('Please make a donation of at least $' + min_amount.value + '.');
		 amount.focus();
		 return false;}
	}else{
		alert('Please enter a valid amount of at least $' + min_amount.value + '.');
		amount.focus();
		return false;
	}
}

	
function isUSCurrency (sString) {
  return RegExp(/^\$?\d+(\.\d{2})?$/).test(String(sString).replace(/^\s+|\s+$/g, ""));
}