Check all

function checkAll(fmobj, checkAllId) {
 
	fmobj =  document.getElementById(fmobj);
  for (var i=0;i<fmobj.elements.length;i++) {
    var e = fmobj.elements[i];
    if ( (e.id != checkAllId) && (e.type=='checkbox') && (!e.disabled) ) {
      e.checked = document.getElementById(checkAllId).checked;
    }
  }
}