请求帮助!关于文本框中限制输入的问题~!

我想限制文本框中只允许输入数字,而且限制数量为10位,如何做~!
最好能有代码例子~!
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1<input name="mm" ondragenter="return false" onkeypress="return cc(987)" onpaste="return !clipboardData.getData('text').match(/\D/)" style="ime-mode:Disabled"/>

只能输入 1-987 之间的数字

1<script language="JavaScript">   
2function cc(n)   
3{   
4var k = window.event.keyCode;   
5var s = window.event.srcElement.value + String.fromCharCode(k);   
6return(k >=48 && k <=57 && parseInt(s, 10) > 0 && parseInt(s, 10) < n);   
7}   
8</script>
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