function createlan()
{
 var form = document.demoform;
 var error="";
 var velden="";
 for(i=0; i<form.elements.length; i++)
 {
  error +=(form.elements[i].value=="" && form.elements[i].name!="")?"\n * "+form.elements[i].name:"";
 }
 alert(error+"\n----------------\n"+document.getElementById('message___Frame').innerHTML);
}