var bad_email_domains = new Array("yahoo.com", "hotmail.com", "aol.com");

function isValidEmail(str) {
   return (str.indexOf(".") > 0) && (str.indexOf("@") > 0);
}

function simpFormValidate(regfields) {
   for (i = 0; i < regfields.length; i++) {
      v = document.getElementById(regfields[i]);
      if (v!=null) {
	 if ((!v.value) || (v.value == "")) {
	    alert("You must specify " + regfields[i]);
	    v.focus();
	    return false;
	 }
	 if (regfields[i] == "email") {
	    if (!isValidEmail(v.value)) {
	       alert("This appears to be a malformed email address.");
	       v.focus();
	       return false;
	    }	  
	 }
      }
   }
   return true;
}