图片特效-延迟加载图片
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<script type="text/javascript">
function init(){
setTimeout('checkHeight()',100);
}
function checkHeight(){
var pic = document.getElementById('pic');
var sTop = document.documentElement.scrollTop;
var cHeight = document.documentElement.clientHeight;
var top = pic.offsetTop;
if(sTop + cHeight < top){
setTimeout('checkHeight()',100);
}else{
pic.src = pic.attributes['lazy_src'].value;
}
}
</script>
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<body style="text-align:center" onload="init()">
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
<img lazy_src="1.jpg" src="" width="150" height="100" id="pic"/>
</body>
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