form提交数据时中文乱码

charset="utf-8" onsubmit="document.charset='utf-8'" action="XXX/XXX.aspx">
                   
                        我要找：
                   

title="" name="search_text"
                        style="color: rgb(0, 0, 0);">

style="background-image: url(Image/pics/bt_search.png)" />