简易日历

<script>

window.onload = function(){

var oDiv=document.getElementById = ('tab');

var aLi=document.getElementByTagName('li');

var oTxt=document.getElementByTagName('div')[0];

for(var i=0;i<aLi.length;i++){

aLi[i].index = i;

aLi[i].className=' ';

}

this.className='active'

}

oTxt.innerHtml = '<h2>'+(this.index+1)+'月活动</h2><p>大家‘+(this.index+1)+’月开心</p>'

</script>