//detectando o navegador:
sAgent = navigator.userAgent;
ie = sAgent.indexOf("MSIE") > -1;

function MudarCor(CB){
  if (CB.checked) {
    hL(CB);
  }
  else {
    dL(CB);
  }
}

function hL(E) {
  if (ie) { //se for internet explorer
    while (E.tagName!="TR") {
      E=E.parentElement;
    }
  }
  else {
    while (E.tagName!="TR") {
      E=E.parentNode;
    }
  }
  E.className = "list_body1";
}

function dL(E) {
  if (ie) {
    while (E.tagName!="TR") {
      E=E.parentElement;
    }
  }
  else {
    while (E.tagName!="TR") {
      E=E.parentNode;
    }
  }
  E.className = "list_body2";
}