頭像圖片的選擇，如何存到數據庫

1.javascript中寫函數

<script type="text/javascript">
    function ShowImage(page, tag) {
        var i = 1;
        var e;
        var a;
        while (e = document.getElementById(tag + i)) {
            a = "image/" + i + ".jpg";
            if (a == page)
                e.style.display = 'block';
            else
                e.style.display = 'none';
            i++;
        }
    }
</script>

 2.在body裏面寫HTML代碼

<%String i = "image/3.jpg";%>
<%String j = "image/2.jpg";%>
<%String k = "image/1.jpg";%>
<tr>
    <td>頭像：</td>
    <td align="left">
    <div style="display: block" id="image1">
    <img src=<%=j%> width="70" height="77" />
    </div>
    <div style="display: none" id="image2">
    <img src=<%=k%> width="70" height="77" />
    </div>
    <div style="display: none" id="image3">
    <img src=<%=i%> width="70" height="77" />
    </div>
    </td>
    <td><select name="head" onchange="ShowImage(this.value, 'image');">
    <option selected="selected" value=<%=i%>>頭像一 </option>
        <option value=<%=j%>>頭像二</option>
        <option value=<%=k%>>頭像三</option>
    </select></td>
    </tr>

    完成這些，就可以圖片的路徑傳個servlet,servlet再存到數據庫中，