文本框中輸入小寫字母即時轉換為大寫實現思路

asp:TextBox ID="TextBoxSeriesNumber" runat="server">/asp:TextBox>

script type="text/javascript">
window.onload = function () {
var textBox = document.getElementById("%= TextBoxSeriesNumber.ClientID %>");

textBox.onkeyup = function () {
this.value = this.value.toUpperCase();
};
};
/script>