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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
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<html xmlns="http://www.w3.org/1999/xhtml"> |
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<head> |
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> |
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<title>js数字验证-细数逝去的过往</title> |
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</head> |
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|
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<body> |
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<script type="text/javascript"> |
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function validate(){ |
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var reg = new RegExp("^[0-9]*$"); |
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var obj = document.getElementById("name"); |
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if(!reg.test(obj.value)){ |
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alert("请输入数字!"); |
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} |
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} |
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</script> |
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|
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请输入数字：<input type="text" id="name" /> |
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<button id="button" onclick="validate();">提交</button> |
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|
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</body> |
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</html> |