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javascript如何统计文本框输入某个字符的个数

2009-07-15 14:29:16| 分类： IT | 标签： |举报 |字号大中小订阅

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<html>

<body>

function calculate()

{

//正则[^a]字符a是你需要统计的字符

document.all.result.value=document.all.uInput.value.replace(/[^a]/g, '').length;

}

</script>

请输入<input name="uInput" type="text">

结果为<input name="result" type="text">

</body>

</html>

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              blogAbstract:'<P style=\"TEXT-INDENT: 2em\"\><html> </P\>\r\n<P style=\"TEXT-INDENT: 2em\"\><body> </P\>\r\n<P style=\"TEXT-INDENT: 2em\"\><script language=\"javas<wbr\>cript\"> </P\>\r\n<P style=\"TEXT-INDENT: 2em\"\>function calculate() </P\>\r\n<P style=\"TEXT-INDENT: 2em\"\>{ </P\>\r\n<P style=\"TEXT-INDENT: 2em\"\>//正则[^a]字符a是你需要统计的字符 </P\>\r\n<P style=\"TEXT-INDENT: 2em\"\>document.all.result.value=document.all.uInput.value.replace(/[^a]/g, \'\').length; </P\>\r\n<P style=\"TEXT-INDENT: 2em\"\>} </P\>\r\n<P style=\"TEXT-INDENT: 2em\"\></script> </P\>\r\n<P style=\"TEXT-INDENT: 2em\"\>请输入<input name=\"uInput\" type=\"text\"> </P\>\r\n<P\></P\>',
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