c# - how to get element value inside gridview using javascript -

i have gridview view have label lblprice , textbox txtquanty , 1 more label lblamount.

<asp:gridview id="griditem2" headerstyle-backcolor="#fc8d10" headerstyle-forecolor="white"         rowstyle-backcolor="skyblue" alternatingrowstyle-backcolor="white" alternatingrowstyle-forecolor="#000"         runat="server" autogeneratecolumns="false" allowpaging="false" onpageindexchanging="griditems_pageindexchanging">     <alternatingrowstyle backcolor="white" forecolor="#000000" />     <columns>         <asp:templatefield>             <headerstyle width="80px" horizontalalign="center" />             <headertemplate>                 <p>action</p>             </headertemplate>             <itemtemplate>                 <asp:imagebutton runat="server" commandname="cmddel" commandargument='<%#((gridviewrow)container).rowindex %>' height="20" width="20" />             </itemtemplate>             <itemstyle width="80px" horizontalalign="center" />         </asp:templatefield>         <asp:templatefield visible="false">             <headertemplate>                 <asp:label runat="server" text="txt"></asp:label>             </headertemplate>             <itemtemplate>                 <asp:label runat="server" id="lblitemid" text='<%#eval("itemid") %>'></asp:label>             </itemtemplate>         </asp:templatefield>          <asp:templatefield visible="true">             <headerstyle width="100px" />             <headertemplate>                 <asp:label runat="server" text="items"></asp:label>             </headertemplate>             <itemtemplate>                 <asp:label runat="server" id="lblname" text='<%#eval("name") %>'></asp:label>             </itemtemplate>         </asp:templatefield>          <asp:templatefield visible="true">             <headerstyle width="120px" />             <headertemplate>                 <asp:label runat="server" text="price"></asp:label>             </headertemplate>             <itemtemplate>                 <asp:label runat="server" cssclass="clsprice" id="lblprice" text='<%#eval("price") %>'></asp:label>             </itemtemplate>         </asp:templatefield>          <asp:templatefield visible="true">             <headerstyle width="120px" />             <headertemplate>                 <asp:label runat="server" text="quantity"></asp:label>             </headertemplate>             <itemtemplate>                 <asp:textbox runat="server" onkeyup="myfunctionname(this.value);" cssclass="clsquant" id="txtquant"></asp:textbox>             </itemtemplate>         </asp:templatefield>          <asp:templatefield visible="true">             <headerstyle width="120px" />             <headertemplate>                 <asp:label runat="server" text="total"></asp:label>             </headertemplate>             <itemtemplate>                 <asp:label runat="server" id="lbltotal"></asp:label>             </itemtemplate>         </asp:templatefield>      </columns>     <headerstyle backcolor="#3ac0f2" forecolor="white" />     <rowstyle backcolor="#a1dcf2" /> </asp:gridview> 

i want fire onkeyup event on txtamount use jquery

function myfunctionname(amount) {     var myvalue = "";     myvalue=$('#griditem2 input[type=text]').closest("tr").find(".clsprice").text();     alert(myvalue); } 

to label value value of label. not working. please suggest