On the specification of guide package in jquery

Mode 1:
<script type= "Text/javascript" src= "Js/jquery-1.8.3.min.js"/>
<script type= "Text/javascript" >
    $ (function () {
        $ ("button"). Click (function () {
            $.ajax ({
                URL: "User/doajax",
                Data:{name: "Little Black", age:20},
                Success:function (data) {
                    Alert (data.name+ "" +data.age);
                }
            })
        })
    })
</script>

********************************************************************
Mode 2

<script type= "Text/javascript" src= "Js/jquery-1.8.3.min.js" ></script>
<script type= "Text/javascript" >
    $ (function () {
        $ ("button"). Click (function () {
            $.ajax ({
                URL: "User/doajax",
                Data:{name: "Little Black", age:20},
                Success:function (data) {
                    Alert (data.name+ "" +data.age);
                }
            })
        })
    })
</script>


Note: The first line of the two methods of idea  only recognize Method 2, do not recognize Method 1 .... I don't know why I tried it myself.

On the specification of guide package in jquery