jQuery hide table rows after third with asp.net, HTML, Jquery

<table>
    <tr id="duplicate">
        <td style="text-align:center;">1</td>
    </tr>
    <tr id="duplicate">
        <td style="text-align:center;">2</td>
    </tr>
    <tr id="duplicate">
        <td style="text-align:center;">3</td>
    </tr>
    <tr id="duplicate">
        <td style="text-align:center;">4</td>
    </tr>
    <tr id="duplicate">
        <td style="text-align:center;">5</td>
    </tr>

jquery:

$(document).ready(function() {
    $('#duplicate'):nth-child(n+3).hide();
    alert('123');
});

Using jQuery to see if a drop down menu select has changed

EXAMPLE2

$("#dropdownID").live('change', function() {
    if ($(this).val() == 'selectionKey'){
        DoSomething();
    } else {
        DoSomethingElse();
    }
});


EXAMPLE2

if ($('#SEJob_ShipmentType').live('change', function() {
        alert($('#SEJob_ShipmentType option:selected').text());
        if ($('#SEJob_ShipmentType option:selected').text() == 'FCL') {
            $('#SEJob_PickUpDate').enabled = false;
        }
    }))

Date fromat change using string format in asp.net

  int strlen;
            string dd, mm, yy, From, To;
            strlen = FromDate.Text.Length;
            dd = FromDate.Text.Substring(0, strlen - 8);
            mm = FromDate.Text.Substring(3, strlen - 8);
            yy = FromDate.Text.Substring(6, strlen - 6);
            From = yy + mm + dd;
            dd = ToDate.Text.Substring(0, strlen - 8);
            mm = ToDate.Text.Substring(3, strlen - 8);
            yy = ToDate.Text.Substring(6, strlen - 6);
            To = yy + mm + dd;

Theme apply in asp.net using CSS With Jquery

var StyleFile = "theme1" + document.cookie.charAt(6) + ".css";
document.writeln('<link rel="stylesheet" type="text/css" href="css/' + StyleFile + '">');

Count Days in between from date and to date in asp.net with jquery in asp.net

$(document).ready(function() {

    var FistDate, SecondDate;
    if ($('#ctl00_ContentPlaceHolder1_ToDate').blur(function() {

        FistDate = $('#ctl00_ContentPlaceHolder1_FromDate').val();
        SecondDate = $('#ctl00_ContentPlaceHolder1_ToDate').val();
        compareDate(FistDate, SecondDate);
        var FistDate = new Date($("#ctl00_ContentPlaceHolder1_FromDate").val().split("/").reverse().join(","));
        var SecondDate = new Date($("#ctl00_ContentPlaceHolder1_ToDate").val().split("/").reverse().join(","));
        var days = (SecondDate - FistDate) / 86400000;
        //alert(FistDate + '  ' + SecondDate);
        $("#ctl00_ContentPlaceHolder1_TotalLeave").val(days + 1);
        //DayCalculate(FistDate, SecondDate);
    }));

    function compareDate(dateTo, dateFrom) {
        var str2 = dateTo;
        var str4 = dateFrom;
        var ONE_DAY = 1000 * 60 * 60 * 24;
        var dt2 = parseInt(str2.substring(0, 2), 10);
        var mon2 = parseInt(str2.substring(3, 5), 10);
        var yr2 = parseInt(str2.substring(6, 10), 10);
        var dt4 = parseInt(str4.substring(0, 2), 10);
        var mon4 = parseInt(str4.substring(3, 5), 10);
        var yr4 = parseInt(str4.substring(6, 10), 10);
        var date2 = new Date(yr2, mon2 - 1, dt2);
        var date4 = new Date(yr4, mon4 - 1, dt4);
        var date2_ms = date2.getTime();
        var date4_ms = date4.getTime();
        var difference_ms = Math.abs(date2_ms - date4_ms)
        var y = Math.round(difference_ms / ONE_DAY)
        if (date2 > date4) {
            $("#ctl00_ContentPlaceHolder1_FromDate").val('');
            $("#ctl00_ContentPlaceHolder1_ToDate").val('');
            alert("From Date Is Less Than To Date");
            $("#ctl00_ContentPlaceHolder1_TotalLeave").val('');
        }
    }

  

})