function onlychinese(event) {
 event = event || window.event;

  var keyCode = event.keyCode;
if (((keyCode >=32) && (keyCode <= 64))||

  ((keyCode >=91) && (keyCode <= 96))||

  ((keyCode >=123) && (keyCode <= 126))) {

  // alert('姓名格式不对');

  document.getElementById("span_user_name").style.color = "red";

  document.getElementById("span_user_name").innerHTML = "<img src='/service/images/tsgz/wrong.gif'></img> 姓名格式不对";

  event.keyCode = 0 ;// firefox的keyCode为只读

  }

}