function checkRequiredFields(input)
		 {

		     var requiredFields = new Array("email", "wachtwoord");

		     var fieldNames = new Array("", "");
		     var fieldCheck   = true;
		     var fieldsNeeded = "\nVul alle velden in:\n\n\t";

		     for(var fieldNum=0; fieldNum < requiredFields.length; fieldNum++) {
		         if ((input.elements[requiredFields[fieldNum]].value == "") ||
		             (input.elements[requiredFields[fieldNum]].value == " ")) {

		             //fieldsNeeded += fieldNames[fieldNum] + "\n\t";
		             fieldCheck = false;
		         }
		     }

		     if (fieldCheck == true)
		     {
		         return true;
		     }
		     else
		     {
		         alert(fieldsNeeded);
		         return false;
		     }
}