$(document).ready(function () {
    var rise_fall = {
        dir: 1,    // Set the direction (1 for down, -1 for up)
        speed: 100,  // 12 to whatever (60 is pretty slow) higher numbers are slower
        Amount: 18, // Smoothness depends on image file size, the smaller the size the more you can use!
        sway: 6,  // Set amount of left/right swaying of objects (default = 10), higher numbers produce more sway

        //Pre-load your image(s) below! 6 is an optimal number for variety. Use just one for uniformity.
        grphcs: [
			    "hoamai.png",
			    "dao.png",
			    "hoamai.gif",
			    "dao.png",
			    "hoamai.png",
			    "dao.png" //<-- no trailing comma after last image
		    ],

        //////////////// Stop Editing //////////////

        loadem: function () {
            for (var i = 0; i < this.grphcs.length; ++i) {
                $(new Image()).attr('src', this.grphcs[i]);
            }
        },
        Ypos: [],
        Xpos: [],
        Speed: [],
        Step: [],
        Cstep: [],
        els: [],
        $master: $('<div style="position:absolute; top:0; left:0; z-index:100000000;">'),
        WinHeight: $(window).height(),
        WinWidth: $(window).width(),

        writeem: function () {
            var i = this.Amount - 1, els = [];
            this.grphcs.sort(function () { return 0.5 - Math.random(); });
            for (i; i > -1; --i) {
                this.els.push($('<img alt="" src="/Scripts/DropFlower/images/' + this.grphcs[i % this.grphcs.length] + '" style="position:fixed;top:0;left:0;">').appendTo(this.$master));
                this.Ypos.push(Math.floor(Math.random() * this.WinHeight));
                this.Xpos.push(Math.floor(Math.random() * this.WinWidth));
                this.Speed.push((Math.random() * 5 + 3) * this.dir);
                this.Cstep.push(0);
                this.Step.push(Math.random() * 0.1 + 0.05);
            }
            $('body').append(this.$master);
        },

        moveem: function () {
            this.WinHeight = $(window).height();
            this.WinWidth = $(window).width();
            for (var i = 0, sy, sx; i < this.Amount; ++i) {
                sy = this.Speed[i] * Math.sin(90 * Math.PI / 180);
                sx = this.Speed[i] * Math.cos(this.Cstep[i]);
                this.Ypos[i] += sy;
                this.Xpos[i] += sx * this.sway * 0.1;
                if (this.Ypos[i] > this.WinHeight && this.dir === 1 || this.Ypos[i] < 0 && this.dir === -1) {
                    this.Xpos[i] = Math.round(Math.random() * this.WinWidth);
                    this.Speed[i] = (Math.random() * 5 + 3) * this.dir;
                }
                this.Ypos[i] = (this.Ypos[i] > this.WinHeight && this.dir === 1) ? -60 : (this.Ypos[i] < 0 && this.dir === -1) ? this.WinHeight + 60 : this.Ypos[i];

                sx = Math.min(this.WinWidth, this.Xpos[i]);
                sy = this.Ypos[i];
                this.els[i].css({ left: sx, top: sy });

                this.Cstep[i] += this.Step[i];
            }
        },
        init: function () {
            this.loadem();
            this.writeem();
            this.moveem();
            setInterval(function () { rise_fall.moveem(); }, this.speed);
        }
    };
    rise_fall.init();

});