html5 input pattern simple question

Dear Experts,

I need an input html5 pattern that only accepts 7 numbers, and the number must start with 1 or 2

I wrote below pattern but one thing is missing. How can I control if the number is started with 1 or 2? Thank you

<input type="text" name="agent" id="agent"  pattern="[0-9]{7}" title="it must be 7 numbers. Need to start with 1 or 2" required autofocus>

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Ryan ChongBusiness Systems Analyst , ex-Senior Application EngineerCommented:

<input type="text" name="agent" id="agent"  pattern="^[1-2][0-9]{6}" title="it must be 7 numbers. Need to start with 1 or 2" required autofocus maxlength="7">

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BRMarketingAuthor Commented:
thank you so much
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