<html>

<head>

<title>三种加事件的方式</title>

<script language="javascript" type="text/javascript">
    
    window.οnlοad=function(){
        
        var arr = new Array(10);
        for(var i = 0; i < arr.length; i ++){
            arr[i]=i;
        }
        
        document.getElementById("but1").οnclick=function(){
            alert("ok");
        }    
        
        var butAdd2 = document.getElementById("but2");
        butAdd2.onclick = function(){
             alert("ok");
        }
          
    }
    
    function butEvent(){
        alert("ok")
    }
    
</script>
</head>

<body>

    <input type="button" value="测试1" id="but1"/>

    <input type="button" value="测试2" id="but2"/>
    
    <input type="button" value="测试3" id="but3" οnclick="butEvent()"/>
</body>

</html>