function RakamKontrol()
{
    var keycode=window.event.keyCode;
    if(keycode>57 || keycode<48)
    window.event.returnValue=false;
}
function HarfKontrol()
{
    var keycode=window.event.keyCode;
    if(keycode<57 && keycode>48)
    window.event.returnValue=false;
}
function MultilineLengthKontrol(txt,maxLen)
{   
   try 
   {   
      if(txt.value.length > (maxLen-1))
      return false;   
   }   
   catch(e)
   {   
   }
}