這個演示，在輸入時，是不需要與服務(wù)端交互，只有全部輸入完畢之后，用戶點銨鈕才進(jìn)行驗證。因此在這里，寫Javascript來實現(xiàn)即可。
script type="text/javascript">
function JumpToNextTextBox(currentTxtBox, nextTextBoxID) {
if (currentTxtBox.value.length >= 5) {
document.getElementById(nextTextBoxID).focus();
}
}
/script>
License Key:
asp:TextBox ID="Number1" runat="server" onkeyup="JumpToNextTextBox(this, 'Number2')" Width="65">/asp:TextBox>
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asp:TextBox ID="Number2" runat="server" onkeyup="JumpToNextTextBox(this, 'Number3')" Width="65">/asp:TextBox>
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asp:TextBox ID="Number3" runat="server" onkeyup="JumpToNextTextBox(this, 'Number4')" Width="65">/asp:TextBox>
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asp:TextBox ID="Number4" runat="server" onkeyup="JumpToNextTextBox(this, 'Number5')" Width="65">/asp:TextBox>
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asp:TextBox ID="Number5" runat="server" MaxLength ="5" Width="65">/asp:TextBox>
