function isEmail(string) {

   if (!string) return false;
   var iChars = "*|,\":<>[]{}`\';()&$#%";

   for (var i = 0; i < string.length; i++) {
      if (iChars.indexOf(string.charAt(i)) != -1)
         return false;
   }
   return true;
}                      
function isProper(string) {

   if (!string) return false;
   var iChars = "*|,\":<>[]{}`\';()@&$#%";

   for (var i = 0; i < string.length; i++) {
      if (iChars.indexOf(string.charAt(i)) != -1)
         return false;
   }
   return true;
}                      
function isReady(form) {
    if (isEmail(contact.email.value) == false) {
        alert("Please enter a valid email address.");
        contact.email.focus();
        return false;
    }
    if (contact.name.value == "") {
        alert("Please enter your name.");
        contact.name.focus();
        return false;
    }
    return true;
}