js月份选择器简单例子

<style>
#div1{
position:absolute;
border:1px solid black;
background-color:buttonface;
}
</style>

<script type="text/javascript">
var yyyy = (new Date()).getFullYear();

function realOffset(o)
{
    var x = y = 0; do{
    x += o.offsetLeft || 0;
    y += o.offsetTop  || 0;
    o  = o.offsetParent;}while(o);
    return {"x" : x, "y" : y};
}
function show(obj)
{
    var div = document.getElementById("div1");
    div.style.display="";
    var xy = realOffset(document.getElementById('b'));
    div.style.top = xy.y+obj.offsetHeight;
    div.style.left= xy.x;
    newYear(0);
}
function newYear(n)
{   
    yyyy+=n;
    var str="";
    for(var i=1;i<13;i++)
    {
        str +=  "<span onclick='document.getElementById("b").value=this.innerHTML;document.getElementById("div1").style.display="none"' style='color:blue'>"+yyyy+"-";
        if(i<10)
            str += "0"+i+"-01</span>";
        else
            str += i+"-01</span>";
        if(i%6==0)
            str+="<br>"
        else
            str+=","
    } // www.jb200.com
    str +=  "<span onclick='newYear(-1)' style='color:blue'>上一年</span>&nbsp;&nbsp;<span onclick='newYear(1)' style='color:blue'>下一年</span>";
    document.getElementById("div1").innerHTML=str;
}
</script>
<input type="text" id="b" onclick="show(this)" readonly/>
<div id=div1 style="display:none"></div>