最も簡単なJavaScript検証整数、小数、実数、有効ビット小数正規表現

2131 ワード
JavaScript 整数 小数点以下 実数 有効ビット数 正規表現 

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<h3>           ！（      ！）</h3> 
   :  <input type="text" size="20" onkeydown="if(event.keyCode == 13) alert(/^/d+$/.test(this.value));" /> 
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   :  <input type="text" size="20" onkeydown="if(event.keyCode == 13) alert(/^-/d+$/.test(this.value));" /> 
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 　 :  <input type="text" size="20" onkeydown="if(event.keyCode == 13) alert(/^-?/d+$/.test(this.value));" /> 
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   :  <input type="text" size="20" onkeydown="if(event.keyCode == 13) alert(/^/d+/./d+$/.test(this.value));" /> 
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   :  <input type="text" size="20" onkeydown="if(event.keyCode == 13) alert(/^-/d+/./d+$/.test(this.value));" /> 
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 　 :  <input type="text" size="20" onkeydown="if(event.keyCode == 13) alert(/^-?/d+/./d+$/.test(this.value));" /> 
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 　 :  <input type="text" size="20" onkeydown="if(event.keyCode == 13) alert(/^-?/d+(/./d+)?$/.test(this.value));" /> 
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  1   :<input type="text" size="20" onkeydown="if(event.keyCode == 13) alert(/^-?/d+(/./d{1,1})?$/.test(this.value));" /> 
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  2   :<input type="text" size="20" onkeydown="if(event.keyCode == 13) alert(/^-?/d+(/./d{1,2})?$/.test(this.value));" /> 
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  3   :<input type="text" size="20" onkeydown="if(event.keyCode == 13) alert(/^-?/d+(/./d{1,3})?$/.test(this.value));" /> 
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