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javascriptjqueryasp.netupdatepanel

Why am I receiving a replace function error when typing into a textarea

I have two separate jquery popup, one of which is populated from a GridView data:

//THIS IS THE POPUP WHICH PRE POPULATES THE TEXTAREA VALUE FROM THE GRIDVIEW
<asp:UpdatePanel runat="server" ID="upPop" UpdateMode="Conditional">
    <ContentTemplate>
        <div id="popupContactEM">
            <a id="popupContactCloseEM" title="Close Window">x</a>
            <div id="dvFourthEM" class="mainFirst">
                <div id="leftdiv1EM" class="leftdivspec"><sup style="color: #FF0000; font-weight: bold;">*</sup>Message:<br /><br /><b style="font-size: xx-small;">Character Count: </b><input maxlength="4" size="4" id="charCountE" style="border: none; font-size: xx-small; color: #E55302;" disabled="disabled" /><br /><b style="font-size: xx-small;">Word Count: </b><input maxlength="4" size="4" style="border: none; font-size: xx-small; color: #E55302;" id="wordCountE" disabled="disabled" /></div>
                <div id="rightdiv1EM" class="rightdivspec"><asp:TextBox ID="tbMessageEM" ClientIDMode="Static" runat="server" TextMode="MultiLine" Columns="30" Rows="5"></asp:TextBox></div>
            </div>
        </div>
        <div id="backgroundPopupEM"></div>
    </ContentTemplate>
</asp:UpdatePanel>

<div id="popupContact">
    <a id="popupContactClose" title="Close Window">x</a>
    <div id="dvFourth" class="mainFirst">
        <div id="leftdiv1" class="leftdivspec"><sup style="color: #FF0000; font-weight: bold;">*</sup>Message:<br /><br /><b style="font-size: xx-small;">Character Count: </b><input maxlength="4" size="4" id="charCount" style="border: none; font-size: xx-small; color: #E55302;" disabled="disabled" /><br /><b style="font-size: xx-small;">Word Count: </b><input maxlength="4" size="4" style="border: none; font-size: xx-small; color: #E55302;" id="wordCount" disabled="disabled" /></div>
        <div id="rightdiv1" class="rightdivspec"><asp:TextBox ID="tbMessage" ClientIDMode="Static" runat="server" TextMode="MultiLine" Columns="30" Rows="5"></asp:TextBox></div>
    </div>
</div>
<div id="backgroundPopup"></div>

I am trying to display the WORD and CHARACTER count for either popup with and I have the following JQuery:

$(document).ready(function () {
    $("#tbMessage").keyup(function () {
        WordCounter(this, 0);
    });

    $("body").on('keyup', "#tbMessageEM", function (e) {
        WordCounter(this, 1);
    });
});

function WordCounter(txt, whc) {

    if (whc == 0) {
        s = txt.value;
    }
    else {
        s = txt;
    }
    if (s.length == 0) {
        len = 0;
    }
    else {
        m1 = s.replace(/\s/g, '+');
        m = m1.replace(/^\s/g, '+');
        len = countWords(m);
    }
    if (whc == 0) {
        document.getElementById("charCount").value = s.length;
        document.getElementById("wordCount").value = len;
    }
    else {
        document.getElementById("charCountE").value = s.length;
        document.getElementById("wordCountE").value = len;
    }

}
function countWords(str) {

    str1 = str.replace(/\+*$/gi, "");
    str2 = str1.replace(/\++/g, ' ');
    var temp = new Array();
    temp = str2.split(' ');
    return temp.length;
}

When the popup which is not pre-populated opens, I am able to enter the text inside the TextArea and it gives me the count.

When the popup which is prepopulated opens, it does give the word/character count from the text inside the TextArea but when I go to enter or delete anything, I get the following error: 0x800a01b6 - JavaScript runtime error: Object doesn't support property or method 'replace':

enter image description here

Please help me resolve the error.

Solution

  • txt was coming up [object HTML TextAreaElement].

    I changed the code to this:

    if (whc == 0) {
    s = txt.value;
}
else {
    s = $("#tbMessageEM").val();;
}

    Instead of getting txt, I am getting the value of the textarea and it is working fine.

    Why it wasn't working:

    For the pre-populated textarea, I was loading the popup this way:

    function loadPopupEM() {
    //loads popup only if it is disabled
    if (popupStatusEM == 0) {
        $("#backgroundPopupEM").css({
            "opacity": "0.7"
        });
        $("#backgroundPopupEM").fadeIn("slow");
        $("#popupContactEM").fadeIn("slow");
        popupStatusEM = 1;
        var w = $("#tbMessageEM").val(); //get the prepopulated text
        WordCounter(w, 1);
    }
}

    When the popup loaded, I got the following error in the line if (s.length == 0):

    0x800a138f - JavaScript runtime error: Unable to get property 'length' of undefined or null reference