JS正则表达式小试牛刀一
2011-07-15 09:19
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<html>
<head>
<script>
// Regex
var str='abcdefg dFw:123456 Fw:7891011';
var reg=/.*?(?=Fw)/; // Get the first Fw
var m=str.match(reg);
if(m){
alert('-->'+m[0]+'<--');
}
</script>
<script>
//校验是否全由数字组成,只能输入1-20个数字
function isDigit(s)
{
var patrn=/^[0-9]{1,20}$/;
if (!patrn.exec(s))
{
alert('Your input is not 1-20 numbers!');
}
else
{
alert('Your input is good!');
}
}
function test()
{
alert('Hello');
}
</script>
</head>
<body>
<input type="text" name="count"/>
<input type="button" name="submit" value="Click!" onclick="isDigit(count.value);"/>
</body>
</html>
<head>
<script>
// Regex
var str='abcdefg dFw:123456 Fw:7891011';
var reg=/.*?(?=Fw)/; // Get the first Fw
var m=str.match(reg);
if(m){
alert('-->'+m[0]+'<--');
}
</script>
<script>
//校验是否全由数字组成,只能输入1-20个数字
function isDigit(s)
{
var patrn=/^[0-9]{1,20}$/;
if (!patrn.exec(s))
{
alert('Your input is not 1-20 numbers!');
}
else
{
alert('Your input is good!');
}
}
function test()
{
alert('Hello');
}
</script>
</head>
<body>
<input type="text" name="count"/>
<input type="button" name="submit" value="Click!" onclick="isDigit(count.value);"/>
</body>
</html>