var run=1;  
function comment_check() {
  var ok=1;
  var rc='1px solid #ff0000',orc='1px dashed #a4a4a4';
  var rb='#FFCCCC',orb='#FFFFFF';

  if(undefined===document.forms['commentForm'] || undefined === document.forms['commentForm'].elements['commentBody']) {clearInterval(commentInt); return;} 
  if(run) {   
    var frm=document.forms['commentForm'];
    var msg=frm.elements['commentBody'];
    var msgRE=/[\>\<]/;
    if(msgRE.test(msg.value)){msg.style.backgroundColor=rb;ok=0;}else {msg.style.backgroundColor=orb;} 
                 
    if(ok==1 && msg.value!="") frm.sbut.disabled=false;else frm.sbut.disabled=true;
  }
}