js中有哪些焦点事件

//    焦点事件：模拟输入框的placeholder功能

    var oInput1 = document.getElementById("input1");

    oInput1.onfocus = function () {

        oInput1.value = "";

    };

    oInput1.onblur = function () {

      oInput1.value = "请输入内容";

    };

    //oInput1.select();