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手机端input[type=xx]，限制长度，并且弹出数字键盘

1.让input在手机端点击的时候弹出数字键盘，并且可以限制长度。

长风秋雁
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慕尼黑5688855

<!DOCTYPE html><html>&nbsp; &nbsp; <head>&nbsp; &nbsp; &nbsp; &nbsp; <meta charset="UTF-8">&nbsp; &nbsp; &nbsp; &nbsp; <title></title>&nbsp; &nbsp; </head>&nbsp; &nbsp; <body>&nbsp; &nbsp; &nbsp; &nbsp; <input type="number"&nbsp; oninput="aaa(this,5)"/>&nbsp; &nbsp; &nbsp; &nbsp; <script>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; function aaa(obj,len){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; var num = obj.value;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if(num.length>len){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; obj.value = num.substring(0,len);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; </script>&nbsp; &nbsp; </body></html>
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