Answer / nikhil

<script language="javascript">
Date.prototype.DaysBetween = function()
{
var intMilDay = 24 * 60 * 60 * 1000;
var intMilDif = arguments[0] - this;
var intDays = Math.floor(intMilDif/intMilDay);
return intDays;
}
var d1 = new Date("06/01/2008");
var d2 = new Date("07/31/2008");
alert(d1.DaysBetween(d2));
var d3=d1.DaysBetween(d2);
document.write(d3);

</script>

Answer / nagaraj

function getDaysMinusWeekend(startDay, startMonth,
startYear, endDay, endMonth, endYear) { var sdate = new Date
(); var edate = new Date(); var odays = 0; var total =
0; sdate.setFullYear(startYear,startMonth,startDay);
edate.setFullYear(endYear,endMonth,endDay);
odays = 6 - sdate.getDay(); if(odays == 6) {
odays = 0; } sdate.setFullYear
(startYear,startMonth,startDay + odays); return
Math.floor(((((edate.getTime() - sdate.getTime()) / 1000 /
60 / 60 / 24) / 7) * 5) + odays);}// ########## startMonth
and endMonth both start at 0 i.e 0 = january, 1 = feb etc
function getDaysMinusWeekend(startDay, startMonth,
startYear, endDay, endMonth, endYear) {
var sdate = new Date();
var edate = new Date();
var odays = 0;
var total = 0;

sdate.setFullYear(startYear,startMonth,startDay);
edate.setFullYear(endYear,endMonth,endDay);

odays = 6 - sdate.getDay();
if(odays == 6) {
odays = 0;
}

sdate.setFullYear(startYear,startMonth,startDay +
odays);

return Math.floor(((((edate.getTime() -
sdate.getTime()) / 1000 / 60 / 60 / 24) / 7) * 5) +

odays);
}

i am making a purchase sheet in html ,it contain names of product(by selecting checkboxes),quantity(textbox) and price(checbox), by using java script i am restricting the user to prevent them to enter the wrong data ,so i made the servlet were i am only able to prevent them to enter the page in empty field , so my doubt is how do you prevent them how to enter non numerical data in quantity field

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