js与表单验证问题

Question

function isChinese(strChinese) {
        if (strChinese.search(/[^\一-\龥]/g,'') != -1)
            document.getElementById("<%=labChinese.ClientID%>").style.display = "none"
        else
            document.getElementById("<%=labChinese.ClientID%>").style.display=""
    }——————————————————————————————————————————————
<tr>
                <td>
                    验证是否为汉字
                </td>
                <td>
                    <asp:TextBox ID="txtChinese" runat="server" onblur="isChinese(this.value)"></asp:TextBox>
                </td>
                <td>
                    <asp:Label ID="labChinese" runat="server" Text="*只能输入汉字" ForeColor="red" Style="display:none"></asp:Label>
                </td>
            </tr>
——————————————————————————————————————————————————
为什么我输入汉字 和不输入汉字 label 都显示呢

Answer 1

<script language="javascript">
function checktruename(truename){
var str=truename;
var Expression=/[^\u4E00-\u9FA5]/; 
var objExp=new RegExp(Expression);
if(objExp.test(str)==true){
   return true;
}else{
   return false;
}
}  
</script></script>/[^\u4E00-\u9FA5]/

Answer 2

 如果 把 子夜的正则 放到我 if (strChinese.search(/[^\一-\龥]/g,'') != -1) 仍然是这种问题