Javascript Adding in Codeside in Asp.net To Check Date Ranges

this.btnLoad.Attributes.Add(“onclick”,”javascript:return CheckDate();”);

<script language=”javascript” type=”text/javascript”>
function CheckDate()
{
var date1=document.getElementById(‘txtFromDate’).value;
var date2=document.getElementById(‘txtToDate’).value;

var datDate1=new Date();
var datDate2=new Date();

datDate1= Date.parse(date1);
datDate2= Date.parse(date2);
datediff = ((datDate2-datDate1)/(24*60*60*1000))
//To Check whether Days are greater than 7 days or not
if(datediff>7)
{
alert(‘You can not select more than 7 days’);
return false;
}
else
{
return true;
}

if(date1 > date2)
{
alert(‘please select proper dates’);
return false;
}
else
{
return true;
}
}
</script>