function str_trim(str){
  
  while(str.substr(0,1) == ' '){
    str = str.substr(1, str.length);
  }

  while(str.substr(str.length-1, str.length) == ' '){
    str = str.substr(0, str.length-1);
  }
  
  return str;

}

function clear_field(str,FormField){
  if (FormField==undefined) FormField=document.domcheck_small.dom;
  if(str_trim(FormField.value.toLowerCase()) == str.toLowerCase()){
    FormField.value = "";
  }
}

function check_form(str,FormObj){
  if (FormObj==undefined) FormObj=document.domcheck_small;
  if(str_trim(FormObj.dom.value) == "" || (str_trim(FormObj.dom.value.toLowerCase()) == str.toLowerCase())){
    alert("Bitte geben Sie einen Domainnamen ein, den Sie prüfen wollen.");
    return false;
  }
  
  FormObj.action="domaincheck.html";
  return true;
}