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(function ($) {
$.fn.alphanumeric = function (p) {
var input = $(this),
az = "abcdefghijklmnopqrstuvwxyz",
options = $.extend({
ichars: '!@#$%^&*()+=[]\\\';,/{}|":<>?~`.- _',
nchars: '',
allow: ''
}, p),
s = options.allow.split(''),
i = 0,
ch,
regex;
for (i; i < s.length; i++) {
if (options.ichars.indexOf(s[i]) != -1) {
s[i] = '\\' + s[i];
}
}
if (options.nocaps) {
options.nchars += az.toUpperCase();
}
if (options.allcaps) {
options.nchars += az;
}
options.allow = s.join('|');
regex = new RegExp(options.allow, 'gi');
ch = (options.ichars + options.nchars).replace(regex, '');
input.keypress(function (e) {
var key = String.fromCharCode(!e.charCode ? e.which : e.charCode);
if (ch.indexOf(key) != -1 && !e.ctrlKey) {
e.preventDefault();
}
});
input.blur(function () {
var value = input.val(),
j = 0;
for (j; j < value.length; j++) {
if (ch.indexOf(value[j]) != -1) {
input.val('');
return false;
}
}
return false;
});
return input;
};
$.fn.numeric = function (p) {
var az = 'abcdefghijklmnopqrstuvwxyz',
aZ = az.toUpperCase();
return this.each(function () {
$(this).alphanumeric($.extend({ nchars: az + aZ }, p));
});
};
$.fn.alpha = function (p) {
var nm = '1234567890';
return this.each(function () {
$(this).alphanumeric($.extend({ nchars: nm }, p));
});
};
})(jQuery);