how client side button click inside textbox inside grid view in jquery

how can i do this thing

$(function() {
$("[id*=lnkITEM]").click(function() {
var Price_List = document.getElementById("<%=txtPriceList.ClientID%>").value;
var retailItem = "";
var grid = document.getElementById("<%= gvRetailOrder.ClientID%>");
for (var i = 0; i < grid.rows.length - 1; i++) {
var txtAmountReceive = $("input[id*=gvtxtItemCode]")
if (txtAmountReceive[i].value != '') {
retailItem=txtAmountReceive[i].value;
}
}
GetStockDetail()
// window.open('../PopUpWindows/InventoryAndStorePopUp/RetailGeneralPopUP.aspx?ShowDetails=ItemCCH&Id=' + ItemCode + '&VariantId=' + VariantNo + '&ItemCodeV=' + retailItem + '&Description=' + Description + '&Description_Value=' + document.getElementById(Description).value + '&UOMId=' + UomId + '&WHID=' + WhId + '&RateId=' + RateId + '&AmountId=' + AmountId + '&QtyId=' + QtyId + '&Price_List=' + Price_List + '&Li_no=' + Sr_no, 'popupwindow', 'width=530,height=480,top=100,left=200');
// document.getElementById("<%=btnhelpwindow.ClientID%>").disabled = true;
// currentfocus = null;
return false;

});
});


function GetStockDetail() {
debugger;

var strStock = document.getElementById("<%=hdnStock.ClientID %>").value;
var xmlDoc = $.parseXML(strStock);


var retailItem = "";
var grid = document.getElementById("<%= gvRetailOrder.ClientID%>");
for (var i = 0; i < grid.rows.length - 1; i++) {
var txtAmountReceive = $("input[id*=gvtxtItemCode]")

if (txtAmountReceive[i].value != '') {
retailItem = txtAmountReceive[i].value;
}
}

var xml = $(xmlDoc);

var Stocks = xml.find("Table1");
// var row1 = $("[id*=gvRetailOrder] tr:last-child").prev("tr").clone(true);
// row1 = $("[id*=gvRetailOrder] tr:last-child").clone(true);
var row = $("[id*=gvRetailOrder] tr:last-child").clone(true);

$("[id*=gvRetailOrder] tr").not($("[id*=gvRetailOrder] tr:first-child")).remove();
$("[id*=gvRetailOrder]").append(row);
$.each(Stocks, function() {
var Stock = $(this);
if ($(this).find("ITEM_CODE").text() == retailItem) {


//Find TextBox using ClassName and set Value.
$("td", row).eq(0).val($(this).find("LI_NO").text());
$("td", row).eq(1).val($(this).find("ITEM_CODE").text());
$("td", row).eq(2).html($(this).find("VARIANT_NO").text());
$("td", row).eq(3).html($(this).find("DESCRIPTION").text());
$("td", row).eq(4).html($(this).find("SALE_UOM").text());
$("td", row).eq(5).html($(this).find("WH_NO").text());
$(".textqty", row).val($(this).find("QUANTITY").text());
$(".textRate", row).val($(this).find("RATE").text());
$("td", row).eq(8).html($(this).find("AMOUNT").text());
$("td", row).eq(9).html($(this).find("TC_CODE").text());
$("[id*=gvRetailOrder]").append(row);
}
// else {
// alert('Please enter valid item');
// return false;
// }
});

}
this work properly but
$("[id*=gvRetailOrder] tr").not($("[id*=gvRetailOrder] tr:first-child")).remove(); this line delete previous row this is the problem

$("[id*=gvRetailOrder] tr").not($("[id*=gvRetailOrder] tr:first-child")).remove();

and when remove this line from my code then insert whole grid with first 1 column