jquery.upperCase.js

/*!
 * upperCase
 * $(element).upperCase( [text] );
 *
 * mit license. sercan cakir. 2013.
 */ 
 $(function () {
    $.fn.upperCase = function() {
        return this.each(function() {
            var $self = $(this),
                text = $self.text(),
                temp = [];
            
            for(var i = 0; i < text.length; i++) {
                var char = text.charAt(i),
                    code = text.charCodeAt(i);
                
                if      (code == 105) temp.push('İ');
                else if (code == 305) temp.push('I');
                else if (code == 287) temp.push('Ğ');
                else if (code == 252) temp.push('Ü');
                else if (code == 351) temp.push('Ş');
                else if (code == 246) temp.push('Ö');
                else if (code == 231) temp.push('Ç');
                else if (code >= 97 ) temp.push(char.toUpperCase());
                else if (code <= 122) temp.push(char.toUpperCase());
                else                  temp.push(char);
            }
            
            $self.text(temp.join(''));
        });
    };
});