var ua = navigator.userAgent.toLowerCase();

  function getPageOffsetLeft (el){
     var ol=el.offsetLeft;
     while ((el=el.offsetParent) != null){
       ol += el.offsetLeft;
     }
     return ol;
  }
  function getDocumentWidth(doc){
    return (doc.body.scrollWidth > doc.body.offsetWidth)?doc.body.scrollWidth:doc.body.offsetWidth;
  }
  function show_Curs(){
    var curs = document.getElementById('curs_big');
    var td_curs = document.getElementById('td_curs');
    var left = getPageOffsetLeft(td_curs) - 9;
    var document_width = getDocumentWidth(document);
    if(curs.style.visibility == 'hidden'){
      curs.style.visibility = 'visible';
      curs.style.left = left;
      if(ua.indexOf("gecko") != -1){
        curs.style.width = (document_width - left);
      }else{
        curs.style.width = '180px';
      }
    }else{
      curs.style.visibility = 'hidden';
      curs.style.left = 0;
    }
  }