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aleecan/username letter validation

Created May 6, 2015 11:11
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  1. aleecan created this gist May 6, 2015.
    13 changes: 13 additions & 0 deletions username letter validation
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,13 @@
    function isLetters(un){
    var a=un;
    var count=0;
    for (var i = a.length - 1; i >= 0; i--) {
    if ((a.charCodeAt(i)>64 && a.charCodeAt(i)<91) || (a.charCodeAt(i)>96 && a.charCodeAt(i)<123) ) {
    count++;
    };
    };
    if (count!=a.length) {
    return false;
    };
    return true;
    }