Created
August 12, 2012 19:31
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Detect invalid characters
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<!DOCTYPE HTML> | |
<html lang="en-US"> | |
<head> | |
<meta charset="UTF-8"> | |
<title></title> | |
<style type="text/css"> | |
.center { | |
text-align: center; | |
} | |
#myInput { | |
font-size: 24px; | |
height: 32px; | |
} | |
.hl { | |
color: #4169e1; | |
} | |
.valid { | |
background-color: #adff2f; | |
} | |
.invalid { | |
background-color: #ff69b4; | |
} | |
</style> | |
</head> | |
<body> | |
<h1 class="center">Character detection test</h1> | |
<p class="center"> | |
<br/><br/> | |
<input type="text" name="myInput" id="myInput"/><br/><br/> | |
<button>Stupid Button</button><br/><br/> | |
<span>RegExp: </span><input type="text" name="regexp" id="regexp" value="[a-zA-ZäöüÄÖÜß \.]"/><br/> | |
<span>Validation: </span><span class="hl" id="valid"></span><br/> | |
<span id="errormsg"></span> | |
</p> | |
<div class="center" id="output"> | |
</div> | |
<script src="jquery.js"></script> | |
<script> | |
(function () { | |
var $input = $('#myInput'), | |
$regexp = $('#regexp'), | |
$valid = $('#valid'), | |
$errormsg = $('#errormsg'); | |
$input.on('change', function (e) { | |
var myRegTest, | |
myRegMatch, | |
value, | |
match, | |
bad = new String(), | |
pos; | |
myRegTest = new RegExp('^' + $regexp.val() + '+$', ''); | |
myRegMatch = new RegExp($regexp.val() + '+', 'g'); | |
value = new String($input.val()); | |
if(myRegTest.test(value)) { | |
$valid.html('True'); | |
$errormsg.html(''); | |
$input.addClass('valid'); | |
return true; | |
} | |
bad = value; | |
match = bad.match(myRegMatch); | |
if (match !== null ) { | |
for(var i in match) { | |
if(match.hasOwnProperty(i)) { | |
bad = bad.replace(match[i], ''); | |
} | |
} | |
} | |
bad = rmDupes(bad.split('')).join(''); | |
$valid.html('False'); | |
$errormsg.html('Invalid characters: ' + bad); | |
$input.addClass('invalid'); | |
return false; | |
}); | |
function rmDupes(arr) { | |
var i, | |
out = [], | |
obj = {}; | |
for (i = 0; i < arr.length; i++) { | |
obj[arr[i]] = 0; | |
} | |
for (i in obj) { | |
out.push(i); | |
} | |
return out; | |
} | |
})(); | |
</script> | |
</body> | |
</html> |
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