做了一个动感十足的tab不敢独占，写出来大家共享，大家可以到宝宝孕历首页看看效果。
其实现是通过js控制div的scrollLeft属性来实现的，tab分成两个部分tab头部分和tab体部分，tab体是一个很宽的层，此div的overflow被设置成hidden，在鼠标挪动到不同的tab标签上时，逐渐修改tab体的scrollLeft属性。
实现的js代码如下：
/* scroll */
var Scroller = Class.create();
Scroller.prototype = {
initialize: function (options){
this .commandsWrapId = options.commandsWrapId;
this .scrollWrapId = options.scrollWrapId;
this .sectionWidth = options.sectionWidth;
this .step = options.step;
},
scrollTo : function (ev){
if ( ! ev)ev = window.event;
var otriger = getSrcElement(ev);
while (otriger && otriger.tagName != ' LI ' ){
otriger = otriger.parentNode;
}
Scroller.runningInstance = otriger.scroller;
var instance = otriger.scroller;
for ( var i = 0 ;i instance.triggers[i].className = ' command unselected ' ;
}
otriger.className = ' command selected ' ;
var index = otriger.scrollIndex;
if (instance.interval)window.clearInterval(instance.interval);
instance.targetLeft = index * instance.sectionWidth;
// 计算一个step,要求在500ms内转到指定位置
instance.step = Math.abs((instance.targetLeft - instance.wrap.scrollLeft) / 25);
instance.interval = window.setInterval(instance.scrollByStep, 10 );
},
scrollByStep : function (){
var i = Scroller.runningInstance;
var current = parseInt(i.wrap.scrollLeft);
if (current > i.targetLeft){
if (current - i.targetLeft else i.wrap.scrollLeft = i.wrap.scrollLeft - i.step ;
} else if (current if (i.targetLeft - current else i.wrap.scrollLeft = i.wrap.scrollLeft + i.step;
} else {
if (i.interval){
window.clearInterval(i.interval);
}
}
},
bindEvent : function (scroller){
scroller.wrap = $id(scroller.scrollWrapId);
var ocommands = $id(scroller.commandsWrapId);
var olis = $tagsC( ' LI ' , ' command ' ,ocommands);
scroller.triggers = olis;
if (olis){
for ( var i = 0 ;i olis[i].scrollIndex = i;
olis[i].scroller = scroller;
addEvent(olis[i], ' mouseover ' ,scroller.scrollTo);
}
}
}
};
需要在页面上调用的css和js代码如下：
Code
<script> <br>addLoadEvent(function(){ <br>var scroller = new Scroller({commandsWrapId:'divScrollCommands',scrollWrapId:'divScrollWrap',sectionWidth:600,step:10}); <br>scroller.bindEvent(scroller);}); <br></script>
