window.onload=function()
{
var slct=document.choosedate.date;
slct.onchange=function()
	{
var Jan=document.getElementById('Jan'),
Feb=document.getElementById('Feb'),
Mar=document.getElementById('Mar'),
Apr=document.getElementById('Apr'),
May=document.getElementById('May'),
Jun=document.getElementById('Jun'),
Jul=document.getElementById('Jul'),
Aug=document.getElementById('Aug'),
Sep=document.getElementById('Sep'),
Oct=document.getElementById('Oct'),
Nov=document.getElementById('Nov'),
Dec=document.getElementById('Dec');
	switch(this.value)
	{
	case 'Jan':reset();jan.style.display='';
	case 'Feb':reset();feb.style.display='',jan.style.display='none';
	case 'Mar':reset();mar.style.display='',jan.style.display='none';
	case 'Apr':reset();apr.style.display='',jan.style.display='none';
	case 'May':reset();may.style.display='',jan.style.display='none';
	case 'Jun':reset();jun.style.display='',jan.style.display='none';
	case 'Jul':reset();jul.style.display='',jan.style.display='none';
	case 'Aug':reset();aug.style.display='',jan.style.display='none';
	case 'Sep':reset();sep.style.display='',jan.style.display='none';
	case 'Oct':reset();oct.style.display='',jan.style.display='none';
	case 'Nov':reset();nov.style.display='',jan.style.display='none';
	case 'Dec':reset();dec.style.display='',jan.style.display='none';
	}
	}
reset();
}
function reset()
{
var jan=document.getElementById('jan'),
feb=document.getElementById('feb'),
mar=document.getElementById('mar'),
apr=document.getElementById('apr'),
may=document.getElementById('may'),
jun=document.getElementById('jun'),
jul=document.getElementById('jul'),
aug=document.getElementById('aug'),
sep=document.getElementById('sep'),
oct=document.getElementById('oct'),
nov=document.getElementById('nov'),
dec=document.getElementById('dec');
feb.style.display='none';
mar.style.display='none';
apr.style.display='none';
may.style.display='none';
jun.style.display='none';
jul.style.display='none';
aug.style.display='none';
sep.style.display='none';
oct.style.display='none';
nov.style.display='none';
dec.style.display='none';
}