JavaScript实现文字内容淡入淡出渐变

2014-01-10 00:30:19 -0500

来自笑忘书
HTML代码

<style>
#wrapper {margin-left:5px;margin-right:5px;}
.button {border:1px solid #eee; background:#ccc; border-radius:3px; -moz-border-radius:3px; padding:4px 3px 5px; width:30px;text-align:center; cursor:pointer; color:#555;margin:3px 5px;}
.button:hover {border:1px solid #fff; background:#d9d9d9; color:#333}
#fade {opacity:0; filter:alpha(opacity='0'); border-radius:3px; -moz-border-radius:3px; margin-bottom:10px; padding:4px 3px 2px; border:1px solid #548954; background:#355c33; color:yellow; text-shadow:1px 2px #ccc;
}
</style>
<script type="text/javascript">
var fadeEffect=function(){
	return{
		init:function(id, flag, target){
			this.elem = document.getElementById(id);
			clearInterval(this.elem.si);
			this.target = target ? target : flag ? 100 : 0;
			this.flag = flag || -1;
			this.alpha = this.elem.style.opacity ? parseFloat(this.elem.style.opacity) * 100 : 0;
			this.si = setInterval(function(){fadeEffect.tween()}, 20);
		},
		tween:function(){
			if(this.alpha == this.target){
				clearInterval(this.si);
			}else{
				var value = Math.round(this.alpha + ((this.target - this.alpha) * .05)) + (1 * this.flag);
				this.elem.style.opacity = value / 100;
				this.elem.style.filter = 'alpha(opacity=' + value + ')';
				this.alpha = value
			}
		}
	}
}();
</script>
<div id="wrapper">
<div id="fade">笑忘书网盘(35230.wodemo.com) 你身边的网页代码收藏馆，每天不定时更新内容，欢迎常来</div>
<div id="buttons">
	<span class="button" onclick="fadeEffect.init('fade', 1)">显示</span>
	<span class="button floatright" onclick="fadeEffect.init('fade', 0)">隐藏</span>
</div>

代码演示

笑忘书网盘(35230.wodemo.com) 你身边的网页代码收藏馆，每天不定时更新内容，欢迎常来

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