Test if string is alphanumeric in Javascript
function isAlphaNum(alphane) { var numaric = alphane; for(var j=0; j<numaric.length; j++) { var alphaa = numaric.charAt(j); var hh = alphaa.charCodeAt(0); if((hh > 47 && hh<58) || (hh > 64 && hh<91) || (hh > 96 && hh<123)) { } else { return false; } } return true; }
This Javascript function tests, if a given string consists only of alphanumeric characters.
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Anonymous on Feb 19, 2010
A much simpler way is to use a regular expression:
function isAlphaNum(alphane) {
return (/^[a-z0-9]*$/i).test(alphane);
}
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