feld=new Array("Name_required", "Vorname_required", "Email_required", "Notiz_required");

feld_name=new Array("Name", "Vorname", "E-Mail", "Text");

name_flag="Y";

form_name="contact";

standart_style="1px solid #333333";

function Check_Input()
{
 var feld_namen="";
 var check_str="";
 
 for(var i=0; i<feld.length; i++)
 {
  if (eval("document."+form_name+"."+feld[i]+".value")=="")
  {
   document.getElementById(feld[i]).style.border="solid 1px red";
   if (name_flag=="Y")
   {
    document.getElementById(feld[i]+"_text").style.color="#FF0000";
   }
   feld_namen=feld_namen.concat(feld_name[i]+", ");
   check_str=check_str+"0";
  }
  else 
  {
   document.getElementById(feld[i]).style.border=standart_style;
   if (name_flag=="Y")
   {
    document.getElementById(feld[i]+"_text").style.color="";
    document.getElementById(feld[i]+"_text").style.fontWeight="";
   }
   check_str=check_str+"1";
  }
 }
 
 if (check_str.indexOf("0")!=-1)
 {
  document.getElementById("Output").style.color="#353535";
  document.getElementById("Output").lastChild.nodeValue=" Bitte ausfühlen: "+feld_namen.substring(0, (feld_namen.length-2));
  return false;
 }
 else
 {
  return true;
 }
}