Try This Code
var grid1= document.getElementById("<%= grd1.ClientID %>");
for (j = 0; j < grid1.rows.length - 1; j++) {
var total = grd.getElementsById("<%=lblTotal.ClientID %>").value + J;
alert(total)
}
OR
var grid1= document.getElementById("<%= grd1.ClientID %>");
for (j = 0; j < grid1.rows.length - 1; j++) {
var total = grd.getElementsById("<%=lblTotal.ClientID %>").value;
var result = total + j;
alert(result)
}
Accept solution or vote
If this will help you
Thanks