function validatedonation() {

  donationamount = document.getElementById("amount").value;

  donationamount = donationamount.replace("$", "");
  donationamount = donationamount.replace(",", "");

  document.getElementById("amount").value = donationamount;
  if(isNaN(donationamount)){
	alert("Please enter a valid amount");	
  }
  else{
	document.form1.submit();  
  } 

}//validatedonation