salestxtName1=txt.id;
        chkCounter=document.getElementById(txt.id).value;
        var url='frmtotalproduct.aspx?v='+ chkCounter +'&Rnd='+Math.random();
        sendRequest(url,totalChanged);
        var drpprd = document.getElementById(txt.id);
        var drpprdText = drpprd.options[drpprd.selectedIndex].text;
               txtprdselected = drpprdText;
        alert(txtprdselected);
        var drpprdValue = drpprd.options[drpprd.selectedIndex].value;
        var lstprd = document.getElementById(listbox);
              if (drpprdValue > 0)
        {
        var myOption;
        myOption = document.createElement("Option");
        myOption.text = drpprdText;
        myOption.value = drpprdValue;
        //Added to List box
        lstprd.add(myOption);