<input id="test" type="button" value="提交"/>

window.onload = function(){

    var test = document.getElementById("test");   

    test.addEventListener("click",myfun2);   

    test.addEventListener("click",myfun1);

}

function myfun1(){  

    alert("你好1");

}

function myfun2(){ 

    alert("你好2");

}