var ObjB = document.getElementById('stx_wr_14'); 
  ObjB.options.length=1;
// 2Â÷ Ç׸ñÀÌ ¾øÀ» °æ¿ì ¼û±è
if( ObjB.options.length<=1 )
  ObjB.style.display  = "none";
else
  ObjB.style.display  = "";