Java Development Tools

I use Jdeveloper 11.1.3.4 with ADF Fusion
Can I connect this with ADF or does it have to be an HTML page?

function calculateWorkingdays(startDate, endDate)
{
var stDate = new Date(startDate);
var enDate = new Date(endDate);
var startDateYear = stDate.getFullYear();
var startDateMonth = stDate.getMonth();
var startDateDat = stDate.getDate();
var endDateYear = enDate.getFullYear();
var endDateMonth = enDate.getMonth();
var endDateDat = enDate.getDate();

ssDate = new Date(startDateYear,startDateMonth,startDateDat);
eeDate = new Date(endDateYear,endDateMonth,endDateDat);if (ssDate > eeDate)
{
return -1;
}
workingDays=0;
while (ssDate <= eeDate)
{
if(ssDate.getDay()!=0 && ssDate.getDay()!=6)
{
workingDays++;
}
ssDate=new Date(ssDate.valueOf()+86400000);
}
return workingDays;
}