Enable gi to focus the first text box on the whole web page by SurfingKeys

SurfingKeys.js

mapkey('gi', 'test', function() {
        var inputs = document.getElementsByTagName('input');
        var input = null;
        for(var i=0; i<inputs.length; i++) {
            if(inputs[i].type=='text') {
                input = inputs[i];
                break;
            }
        }
        if(input) {
            input.click();
            input.focus();
        }
    }
);