function check(input,numbers){
    var ok = true;
          for(var i = 0; ok && i < input.length; i++){
               var chr=input.charAt(i);
               var found = false;
               for (var j = 0;!found && j<numbers.length;j++){
                    if(chr == numbers.charAt(j))
                         found=true;
               }
               if(!found)ok = false;
          }
          return ok;
    }


	 
	 
 function testform(form){
          if((form.f.value =="")||(form.i.value =="")||(form.o.value =="")||(form.telefon.value ==""))
          {
               alert("Не заполнены обязательные поля");
               return;
          }

          form.submit();
}