$(function() {

   var ABI_ORIGINAL_HEIGHT = $(window).height();
    $(window).scroll(function(){
        var ABI_ORIGINAL_SCROLL = $(this).scrollTop();
        if(ABI_ORIGINAL_SCROLL > ABI_ORIGINAL_HEIGHT / 2) {
            $('html').addClass('fixedActive');
        } else {
            $('html').removeClass('fixedActive');
        }
    });

    function filterPath(string) {
        return string
        .replace(/^\//,'')
        .replace(/(index|default).[a-zA-Z]{3,4}$/,'')
        .replace(/\/$/,'');
    }

    var locationPath = filterPath(location.pathname);
    var scrollElem = scrollableElement('html', 'body');

    // Any links with hash tags in them (can't do ^= because of fully qualified URL potential)
    $('a[href*=#]').each(function() {

        // Ensure it's a same-page link
        var thisPath = filterPath(this.pathname) || locationPath;
        if (  locationPath == thisPath
            && (location.hostname == this.hostname || !this.hostname)
            && this.hash.replace(/#/,'') ) {

                // Ensure target exists
                var $target = $(this.hash), target = this.hash;

                if ($target.offset() !== null  ){

                    if (target) {

                        // Find location of target
                        var targetOffset = $target.offset().top;
                        $(this).click(function(event) {

                            // Prevent jump-down
                            event.preventDefault();

                            // Animate to target
                            $(scrollElem).animate({scrollTop: targetOffset}, 500, function() {

                                // Set hash in URL after animation successful
                                location.hash = target;

                            });
                        });
                    }
                }
        }

    });

    // Use the first element that is "scrollable"  (cross-browser fix?)
    function scrollableElement(els) {
        for (var i = 0, argLength = arguments.length; i <argLength; i++) {
            var el = arguments[i],
            $scrollElement = $(el);
            if ($scrollElement.scrollTop()> 0) {
                return el;
            } else {
                $scrollElement.scrollTop(1);
                var isScrollable = $scrollElement.scrollTop()> 0;
                $scrollElement.scrollTop(0);
                if (isScrollable) {
                    return el;
                }
            }
        }
        return [];
    }

});

//IE7-8 PNG騾乗�繝輔ぅ繝ｫ繧ｿ繝ｼ蟇ｾ遲�
$(function() {
    if(navigator.userAgent.indexOf("MSIE") != -1) {
        $('img').each(function() {
            if($(this).attr('src').indexOf('.png') != -1) {
                $(this).css({
                    'filter': 'progid:DXImageTransform.Microsoft.AlphaImageLoader(src="' +
                    $(this).attr('src') +
                    '", sizingMethod="scale");'
                });
            }
        });
    }
});