js实现逐渐变色的文字特效

2015-11-14 网页编程网 网页编程网

<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>逐渐变色的字</title>
<style>
.box{
position:relative;
width:1000px;
}
.comm{
font-size:60px;
color:#ddd;
font-family:黑体;
position: absolute;
top:0;
left:0;
}
.red{
color: #0000FF;
width: 0;
overflow: hidden;
white-space: nowrap;
z-index: 10;
};
</style>
</head>
<body>
<div class="box">
<strong id="Title" class="comm">网页编程网 www.youkud.com</strong>
</div>
<script>
function getStyle( elem, name){
if (elem.style[name])
return elem.style[name];
else if (elem.currentStyle)
return elem.currentStyle[name];
else if (document.defaultView && document.defaultView.getComputedStyle) {
name = name.replace(/([A-Z])/g,"-$1");
name = name.toLowerCase();
var s = document.defaultView.getComputedStyle(elem,"");
return s && s.getPropertyValue(name);}
else return null;
}
(function(){
var lb = document.getElementById("Title"),
lt = lb.cloneNode(true),
i = 0,
sw = parseInt(getStyle(lb,'width'));
lt.setAttribute('id',lb.getAttribute('id')+'1');
lt.className = 'comm red';
lb.parentNode.appendChild(lt);
window.sliderFont = setInterval(function(){
parseInt(getStyle(lt,'width')) >= sw ? clearInterval(window.sliderFont) : lt.style['width'] = i++ + 'px';
},10);
})();
</script>
</body></html>

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