How to apply javascript on SelectedIndexChanging of grid view - asp.net

Question

I have wriiten a javascript which I am using it onblur event of textbox which is inside a gridview. The same script should fire for me when I perform SelectedIndexChanging of gridview. This is my script
<script type="text/javascript">
function total(txtQuantity, txtRate, txtAmount) {
var col1;
var totalcol1 = 0;
var weight = document.getElementById(txtQuantity).value;
var rate = document.getElementById(txtRate).value;
var tot = weight * rate;
document.getElementById(txtAmount).value = tot.toFixed(2).toString();
var grid = document.getElementById('<%=grdInvoice.ClientID %>');
for (i = 0; i < grid.rows.length; i++) {
col1 = grid.rows[i].cells[4];
//col2 = grid.rows[i].cells[1];
for (j = 0; j < col1.childNodes.length; j++) {
if (col1.childNodes[j].type == "text") {
if (!isNaN(col1.childNodes[j].value) && col1.childNodes[j].value != "") {
totalcol1 += parseInt(col1.childNodes[j].value)
}
}
}
}
document.getElementById('<%= lblTotal.ClientID %>').innerHTML = totalcol1.toFixed(2).toString();
document.getElementById('<%=lblResultbalance.ClientID%>').innerHTML = totalcol1.toFixed(2).toString();
document.getElementById('<%=TextBox1.ClientID%>').value = totalcol1.toFixed(2).toString();
}
Can some one help me

Answer 1

Try this in your event
ScriptManager.RegisterStartupScript(this, GetType(), "script", "total('" + txt1.ClientID + "','" + txt2.ClientID + "','" + txt3.ClientID + "')", true);