/******************************************************
* jQuery plug-in
* Easy Background Image Resizer
* Developed by J.P. Given (http://johnpatrickgiven.com)
* Useage: anyone so long as credit is left alone
******************************************************/

(function($) {
// Global Namespace
    var jqez = {};

    // Define the plugin
    $.fn.ezBgResize = function(options) {

// Set global to obj passed
jqez = options;

// If img option is string convert to array.
// This is in preparation for accepting an slideshow of images.
if (!$.isArray(jqez.img)) {
var tmp_img = jqez.img;
jqez.img = [tmp_img]
}

$("<img/>").attr("src", jqez.img).load(function() {
jqez.width = this.width;
jqez.height = this.height;

// Create a unique div container
$("body").append('<div id="jq_ez_bg"></div>');

// Add the image to it.
$("#jq_ez_bg").html('<img src="' + jqez.img[0] + '" width="' + jqez.width + '" height="' + jqez.height + '" border="0">');

// First position object
$("#jq_ez_bg").css("visibility","hidden");

// Overflow set to hidden so scroll bars don't mess up image size.
$("body").css({
"overflow":"hidden"
});

resizeImage();
});
    };

$(window).bind("resize", function() {
resizeImage();
});

// Actual resize function
    function resizeImage() {

        $("#jq_ez_bg").css({
            "position":"fixed",
            "top":"0px",
            "left":"0px",
            "z-index":"-1",
            "overflow":"hidden",
            "width":$(window).width() + "px",
            "height":$(window).height() + "px",
"opacity" : jqez.opacity
        });

// Image relative to its container
$("#jq_ez_bg").children('img').css("position", "relative");

        // Resize the img object to the proper ratio of the window.
        var iw = $("#jq_ez_bg").children('img').width();
        var ih = $("#jq_ez_bg").children('img').height();
        
        if ($(window).width() > $(window).height()) {
            //console.log(iw, ih);
            if (iw > ih) {
                var fRatio = iw/ih;
                $("#jq_ez_bg").children('img').css("width",$(window).width() + "px");
                $("#jq_ez_bg").children('img').css("height",Math.round($(window).width() * (1/fRatio)));

                var newIh = Math.round($(window).width() * (1/fRatio));

                if(newIh < $(window).height()) {
                    var fRatio = ih/iw;
                    $("#jq_ez_bg").children('img').css("height",$(window).height());
                    $("#jq_ez_bg").children('img').css("width",Math.round($(window).height() * (1/fRatio)));
                }
            } else {
                var fRatio = ih/iw;
                $("#jq_ez_bg").children('img').css("height",$(window).height());
                $("#jq_ez_bg").children('img').css("width",Math.round($(window).height() * (1/fRatio)));
            }
        } else {
            var fRatio = ih/iw;
            $("#jq_ez_bg").children('img').css("height",$(window).height());
            $("#jq_ez_bg").children('img').css("width",Math.round($(window).height() * (1/fRatio)));
        }

// Center the image
if (typeof(jqez.center) == 'undefined' || jqez.center) {
if ($("#jq_ez_bg").children('img').width() > $(window).width()) {
var this_left = ($("#jq_ez_bg").children('img').width() - $(window).width()) / 2;
$("#jq_ez_bg").children('img').css({
"top" : 0,
"left" : -this_left
});
}
if ($("#jq_ez_bg").children('img').height() > $(window).height()) {
var this_height = ($("#jq_ez_bg").children('img').height() - $(window).height()) / 2;
$("#jq_ez_bg").children('img').css({
"left" : 0,
"top" : -this_height
});
}
}

        $("#jq_ez_bg").css({
"visibility" : "visible"
});

// Allow scrolling again
$("body").css({
            "overflow":"auto"
        });

        
    }
})(jQuery);