oDevId.onmousedown = function(e){
  var e = e || window.event;
　 alert(‘e:‘+e.button);

  if(e.button == "2"){
　　alert(‘‘你点击的是右键)
    this.value = http://www.mamicode.com/‘‘;
  }else if(e.button == ‘0‘){
　　alert(‘你点击的是左键‘)
　}
}