/*
* (c) 2008-9 Jason Frame
* Auxiliary element code based on work by pjesi (http://wtf.hax.is/)
*/
(function ($) {

/**
* Initialise input hints on all matched inputs.
*
* Usage examples:
*
* Add hints to all inputs with the 'title' attribute set:
* $('input[title],textarea[title]').inputHint();
*
* Add hints to all matched elements, grabbing the hint text from each element's
* adjacent <kbd/> tag:
* $('input').inputHint({using: '+ kbd'});
*
* Options keys:
* using: jQuery selector locating element containing hint text, relative to
* the input currently being considered.
* hintAttr - tag attribute containing hint text. Default: 'title'
* hintClass - CSS class to apply to inputs with active hints. Default: 'hint'
*/
$.fn.inputHint = function(options) {

options = $.extend({hintClass: 'hint', hintAttr: 'title'}, options || {});

function hintFor(element) {
var h;
if (options.using && (h = $(options.using, element)).length > 0) {
return h.text();
} else {
return $(element).attr(options.hintAttr) || '';
}
}

function showHint() {
if ($(this).val() == '') {
$(this).addClass(options.hintClass).val(hintFor(this));
}
}

function removeHint() {
if ($(this).hasClass(options.hintClass)) $(this).removeClass(options.hintClass).val('');
}

this.filter(function() { return !!hintFor(this); })
.focus(removeHint).blur(showHint).blur();

        this.each(function() {
            var self = this;
            $(this).parents('form').submit(function() { removeHint.apply(self); });
        });

return this.end(); // undo filter

};

})(jQuery);