I am having a problem with implementing the code on my side. My page is contained in a Master Page.

The Javascript generated on the page
//<![CDATA[
function SelectAll(Rows,GridName,SelectAll)
{
TotalChkBx = parseInt(Rows);
var TargetBaseControl = document.getElementById(GridName);
var TargetChildControl = "chkSelect";
var Inputs = TargetBaseControl.getElementsByTagName("input");
for(var iCount = 0; iCount = 0)
Inputs[iCount].checked = document.getElementById(SelectAll).checked;
}
}
//]]>

and the grid part that makes use of the script is:

And the code behind is:

protected void Page_Load(object sender, EventArgs e)
{
            if (!Page.IsPostBack)
            {
                LoadMandatesList();
            }
            if (!Page.ClientScript.IsClientScriptBlockRegistered("MandateSelectAll"))
            {
                string strScript = Global.GetSelectAllScript();
                Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "MandateSelectAll", strScript, true);
            } //I have also tried it by putting this in the code-behind of the master page
}
protected void LoadMandatesList()
{
            BindMandateList(0);
}
private void BindMandateList(int intNewPageIndex)
        {
            g_dtMandatesList = (GlobalVariables.g_AccessLevel == 1 || GlobalVariables.g_AccessLevel == 2) ?
                Mandate.GetMandatesList(g_AgencyID) : Mandate.GetMandatesList(g_AgencyID, g_AgentID);
            Global.BindGridView(ref grdMandatesList, g_dtMandatesList, intNewPageIndex);
        }

protected void grdMandatesList_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.Header)
            {
                string strGridName = grdMandatesList.ClientID, strSelectAll = ((CheckBox)e.Row.FindControl("chkSelectAll")).ClientID;
                string strJavascript = "javascript:SelectAll(" + g_dtMandatesList.Rows.Count + "," + strGridName + "," + strSelectAll + ")";
                ((CheckBox)e.Row.FindControl("chkSelectAll")).Attributes.Add("onclick", strJavascript);
            }
}

public static string GetSelectAllScript(int intRows)
        {
            StringBuilder strRefreshScript = new StringBuilder();
            strRefreshScript.Append("function SelectAll(Rows,GridName,SelectAll)\n");
            strRefreshScript.Append("{\n");
            strRefreshScript.Append("\t TotalChkBx = parseInt(Rows);\n");
            strRefreshScript.Append("\t var TargetBaseControl = document.getElementById(GridName);\n");
            strRefreshScript.Append("\t var TargetChildControl = \"chkSelect\"; \n");
            strRefreshScript.Append("\t var Inputs = TargetBaseControl.getElementsByTagName(\"input\");\n");
            strRefreshScript.Append("\t for(var iCount = 0; iCount = 0)\n");
            strRefreshScript.Append("\t\t\t Inputs[iCount].checked = document.getElementById(SelectAll).checked;\n");
            strRefreshScript.Append("\t }\n");
            strRefreshScript.Append("}\n");
            return strRefreshScript.ToString();
        }

Please help me figure out what could be wrong with my code.

Thanks a stack.