Jquery validations(text box allow only numerics)

(1)Allow only numeric in textbox control
=======================================================

<asp:TextBox ID="txtMobileNo" runat="server" required="true"
                  x-moz-errormessage="Mobile No is required along with formate." MaxLength="12" pattern="[0-9]{12,12}"
                  onkeypress="return validateAllowOnlyNumerics(event);"></asp:TextBox>

function validateAllowOnlyNumerics(nkey)
{
    var keyval
    if (navigator.appName == "Microsoft Internet Explorer") {
        keyval = window.event.keyCode;
    }
    else if (navigator.appName == 'Netscape') {
        nkeycode = nkey.which;
        keyval = nkeycode;
    }

    //For 0-9
    if (keyval >= 48 && keyval <= 57) {
        return true;
    }
        //For General
    else if (keyval == 0) {
        return true;
    }
        //For Backspace
    else if (keyval == 8) {
        return true;
    }
    else {
        return false;
    }
}

$(function () {

    $("[id*=btnGet]").click(function () {

        var checked_radio = $("[id*=rblFruits] input:checked");

        var value = checked_radio.val();

        var text = checked_radio.closest("td").find("label").html();

        alert("Text: " + text + " Value: " + value);

       return false;

    });

});

$(function () {

    $("[id*=btnSet_Text]").click(function () {

        var text = "Mango";

        var radio = $("[id*=rblFruits] label:contains('" + text + "')").closest("td").find("input");

        radio.attr("checked", "checked");

        return false;

    });

});

$(function () {

    $("[id*=btnSet_Value]").click(function () {

        var value = "2";

        var radio = $("[id*=rblFruits] input[value=" + value + "]");

        radio.attr("checked", "checked");

        return false;

    });

});

//Get value of selected items $("#demo").click(function () {          var selectedValues = [];     $("[id*=CheckBoxList1] input:checked").each(function () {                   selectedValues.push($(this).val());     });     if (selectedValues.length>0) {         alert("Selected Value(s): " + selectedValues);     } else {         alert("No item has been selected.");     } }); //Get text of selected items  $("#demo").click(function () {            $("[id*=CheckBoxList1] input:checked").each(function () {          alert($(this).next().html());      });  }); $("[id*=CheckBoxList1] input:checkbox").prop('checked',true); //To check all $("[id*=CheckBoxList1] input:checkbox").prop('checked',false);// To uncheck all

//Check Items by value    var selValue = [1, 2, 4];    var $ctrls = $("[id*=CheckBoxList1]");    for (var i = 0; i < selValue.length; i++) {        $ctrls.find('input:checkbox[value=' + selValue[i] + ']').prop('checked', true);    } //Check Items by Text     var selText = ['Item-1','Item-3'];     var $ctrls = $("[id*=CheckBoxList1]");     for (var i = 0; i < selText.length; i++) {         $ctrls.find('label:contains("' + selText[i] + '")').prev().prop('checked', true);     } $("[id*=CheckBoxList1] input:checkbox").change(function () {           var maxSelection = 3;           if ($("[id*=CheckBoxList1] input:checkbox:checked").length > maxSelection) {               $(this).prop("checked", false);               alert("Please select a maximum of " + maxSelection + " items.");           }       }) $("[id*=btnGet]").click(function () {

            var ddlFruits = $("[id*=ddlFruits]");

            var selectedText = ddlFruits.find("option:selected").text();

            var selectedValue = ddlFruits.val();

            alert("Selected Text: " + selectedText + " Value: " + selectedValue);

            return false;

        });