找javascript和HTML的语法错误

javascripthtmljson

<!DOCTYPE html>
<html>
<head></head>
<body>
<div id="div1">
</div><script type="text/javascript">
var objs= [{"firstName":"jin","lastName":"zhihua"},{"firstName":"Klint","lastName":"Tom"}];
var id = document.getElementById("div1");
id.innerHTML = "";
for(var i = 0;i<objs.length;i++)
{
id.innerHTML +=objs[i].firstName+" "+objs[i].lastName+"<br>";
}
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
    window.onload = function () {
        var objs = [{ "firstName": "jin", "lastName": "zhihua" }, { "firstName": "Klint", "lastName": "Tom"}];
        var id = document.getElementById("div1");//////

        id.innerHTML = "";
        for (var i = 0; i < objs.length - 1; i++) {
            id.innerHTML += objs[i].firstName + " " + objs[i].lastName + "<br>";
        }
    }
</script>
</head>
<body>
<div id="div1">
</div>
</body>
</html>
js是从上往下执行的，而jquery是先把页面加载完了，在去执行js代码。
而且你的代码中document.getElementByID最后的D应该为小写，objs.Length中的L为小写。
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<div id="div1">
</div>
</body>
<script type="text/javascript">
var objs= [{"firstName":"jin","lastName":"zhihua"},{"firstName":"Klint","lastName":"Tom"}];
var id = document.getElementById("div1");
id.innerHTML = "";
for(var i = 0;i<objs.length;i++)
{
id.innerHTML +=objs[i].firstName+" "+objs[i].lastName+"<br>";
}
</script>
</html>