在网页中鼠标进行点击时，会在鼠标上生成一个自定义的表情或者符号，js代码如下

window.onclick = function(event) {
	var heart = document.createElement("b");
	heart.onselectstart = new Function('event.returnValue=false');
	document.body.appendChild(heart).innerHTML = "BlueCat";
	heart.style.cssText = "position: fixed;left:-100%;";
	var f = 16, // 字体大小
		x = event.clientX - f / 2, // 横坐标
		y = event.clientY - f, // 纵坐标
		c = randomColor(), // 随机颜色
		a = 1, // 透明度
		s = 1.2; // 放大缩小
	var timer = setInterval(function() { 
		if (a <= 0) {
			document.body.removeChild(heart);
			clearInterval(timer);
		} else {
			heart.style.cssText = "font-size:16px;cursor: default;position: fixed;color:" + c + ";left:" + x + "px;top:" + y + "px;opacity:" + a + ";transform:scale(" + s + ");";
			y--;
			a -= 0.016;
			s += 0.002;
		}
	}, 12)
}
	
// 随机颜色
function randomColor() {
	return "rgb(" + (~~(Math.random() * 255)) + "," + (~~(Math.random() * 255)) + "," + (~~(Math.random() * 255)) + ")";
}