love.user.js

// ==UserScript==
// @name           Love
// @namespace      http://091018.com
// @include        http://www.douban.com/people/*
// @description    Love
// @version        20101015
// ==/UserScript==
/*globals XPathResult, GM_getValue, GM_setValue, localStorage, unescape,
frameElement */

"use strict";

( function() {
    var now = new Date()
    if(now.getMonth()+1 != 10 || now.getDate() != 18)
        return
    var BASE_CSS = "" +
      ".fire{display:block; overflow:hidden; font-size:12px; position:absolute};" +
      "body{overflow:hidden;}" +
      "html{overflow:hidden;}"

    function addStyle( css ) {
        var style = document.createElement( "style" );
        style.type = "text/css";
        style.textContent = css; // innerHTML throws NO_MODIFICATION_ALLOWED_ERR
        document.getElementsByTagName( "head" )[0].appendChild( style );
        return style;
    }
    addStyle( BASE_CSS );
    
    var Fire = function(r, color) {
    	this.radius = r || 12;
    	this.color = color;
    	this.xpos = 0;
    	this.ypos = 0;
    	this.zpos = 0;
    	this.vx = 0;
    	this.vy = 0;
    	this.vz = 0;
    	this.mass = 1;
    	this.x =0;
    	this.y=0;
    	this.p = document.createElement("span");
    	this.p.className = "fire";
    	this.p.innerHTML = "*";
    	this.p.style.fontSize = this.radius + "px";
    	this.p.style.color = "#" + this.color;
    }
    Fire.prototype = {
    	append: function(parent) {
    		parent.appendChild(this.p);
    	},
    	setSize: function(scale) {
    		this.p.style.fontSize = this.radius * scale + "px";
    	},
    	setPosition:function(x, y) {
    		this.p.style.left = x + "px";
    		this.p.style.top =  y + "px";
    	},
    	setVisible: function(b) {
    		this.p.style.display = b ? "block" : "none";
    	}
    }
    var fireworks = function() {
    	var fires = new Array();
    	var count = 150;
    	var fl = 250;
    	var vpx = 500;
    	var vpy = 300;
    	var gravity = .5;
    	var floor = 200;
    	var bounce = -.8;
    	var timer;
    	var wind = ((Math.floor(Math.random()*3) + 3)/10)*(Math.random()*2 - 1 > 0 ? 1 : -1)*.25;
    	var wpos = 0;
    	var wcount;
    	return {
    		init: function() {
    			wcount = 50 + Math.floor(Math.random() * 100);
    			for (var i=0; i<count; i++) {
    				var color = 0xFF0000;
    				color = (Math.random() * 0xFFFFFF).toString(16).toString().split(".")[0];
    				while(color.length < 6) {
    					color = "0" + color;
    				}
    				var fire = new Fire(12, color);
    				fires.push(fire);
    				fire.ypos = -100;
    				fire.vz = Math.random() * 6 - 3;
    				fire.vx = (Math.random()*2 - 1)*2 ;
    				fire.vy = Math.random()*-15 - 15;
    				fire.x = 500
    				fire.y = 600;
    				fire.append(document.body);
    			}
    			var that = this;
    			timer = setInterval(function() {
    				wpos++;
    				if (wpos >= wcount) {
    					wpos = 0;
    					wcount = 50 + Math.floor(Math.random() * 100);
    					wind = ((Math.floor(Math.random()*3) + 3)/10)*(Math.random()*2 - 1 > 0 ? 1 : -1)*.25;
    				}
    				for (var i=0;i<count; i++) {
    					that.move(fires[i]);
    				}
    			}, 30);
    		},
    		move: function(fire) {
    			fire.vy += gravity;
    			fire.x += fire.vx;
    			fire.y += fire.vy;
    			fire.vx += wind;
    			fire.setPosition(fire.x, fire.y);
    				if (fire.x < 0 || fire.x >1000 || fire.y  < 0 || fire.y  > 600) {
    					fire.vx = (Math.random()*2 - 1)*2;
    					fire.vy = Math.random()*-15 - 15;
    					fire.x = 500;
    					fire.y = 600;
    					fire.setPosition(fire.x, fire.y);
    				}
    		}
    	}
    }
    fireworks().init();
    
}() );