JAVASCRIPT calculate date and date difference
<div id="someid"></div>
<script type="text/javascript">
//day/month/year
t1="02/06/2013";
t2="01/07/2013";
//Total time for one day
var one_day=1000*60*60*24;
//Here we need to split the inputed dates to convert them into standard format
var x=t1.split("/");
var y=t2.split("/");
//date format(Fullyear,month,date)
var date1=new Date(x[2],(x[1]-1),x[0]);
var date2=new Date(y[2],(y[1]-1),y[0])
var month1=x[1]-1;
var month2=y[1]-1;
//Calculate difference between the two dates, and convert to days
var Diff_result=Math.ceil((date2.getTime()-date1.getTime())/(one_day)); //results 29=Days
var somediv = document.getElementById('someid');
somediv.innerHTML = Diff_result + "=Days";
</script>
