Load javascript and speed issues
===

I have in my code, and extended version of -

    string CurrMonth = "Jan";
    int rowId = 1;
    string MIMO = "";
    double JanMITotal = 0.0;
    double JanMOTotal = 0.0;
    //continued all the way to December

    foreach (DataRow dr in dtMIMODetails.Rows) { //dtDetail has about 50 rows
      HtmlTableRow rowDetails = new HtmlTableRow();
      MIMO = dtMIMODetails["MIMO".ToString();
      {
		CurrMonth = "Jan";
		HtmlTableCell cell = new HtmlTableCell();
		cell.Style.Add(HtmlTextWriterStyle.BackgroundColor, "#FFFF99");
		cell.Style.Add(HtmlTextWriterStyle.TextAlign, "center");

		TextBox tb = new TextBox();
		tb.Style.Add(HtmlTextWriterStyle.BackgroundColor, "#FFFF99");
		tb.Style.Add(HtmlTextWriterStyle.TextAlign, "center");
		tb.Style.Add(HtmlTextWriterStyle.FontSize, "small");
		tb.Style.Add(HtmlTextWriterStyle.Width, "40px");
		tb.Style.Add(HtmlTextWriterStyle.Display, "None");
		tb.ID = "tb" + CurrMonth + "_" + MIMO + "_" + "_" + rowID;
		tb.Text = drMIMODetails[CurrMonth].ToString();

		HtmlAnchor htmlanchor = new HtmlAnchor();
		htmlanchor.ID = "ha" + CurrMonth + "_" + MIMO + "_" + rowID;
		htmlanchor.HRef = "#" + htmlanchor.ID;
		htmlanchor.Title = "Click to change value"; //tooltip
		htmlanchor.InnerText = drMIMODetails[CurrMonth].ToString();
		htmlanchor.Attributes.Add("onclick", "handleTextBox('" + CurrMonth + "', '" + MIMO  + "', '" + rowID + "', 'Show')");

		tb.Attributes.Add("onkeyup", "updateMIMOTotals('" + CurrMonth + "', '" + MIMO  + "', '" +  recordID + "','" + rowID + "')");
		tb.Attributes.Add("onblur", "handleTextBox('" + CurrMonth + "', '" + MIMO  + "', '" + rowID + "', 'Hide')");

		FilteredTextBoxExtender ftbe = new FilteredTextBoxExtender();
		ftbe.ID = "ftbe" + CurrMonth + "_" + MIMO + "_" + rowID;
		ftbe.TargetControlID = tb.ID;
		ftbe.FilterType = FilterTypes.Custom | FilterTypes.Numbers;
		ftbe.ValidChars = ".";

		cell.Controls.Add(tb);
		cell.Controls.Add(ftbe);
		cell.Controls.Add(htmlanchor);
		rowDetails.Cells.Add(cell);

		if (MIMO == MOVEINS) {
			JanMITotal = JanMITotal + Convert.ToDouble(drMIMODetails[CurrMonth]);
		}
		else if (MIMO == MOVEOUTS) {
			JanMOTotal = JanMOTotal + Convert.ToDouble(drMIMODetails[CurrMonth]);
		}
      }

      rowId++;
    }

which is repeated for 12 months.

There are other values on this form, that when changed causes this loop to be run again, which is fine. I need to reload the values with the result that the other value change causes.

But after making that other change and reloading the page about 4-5 times, I get the dreaded "Stop running script?" error.

Is there a better way? I do have a javascript file that I use and am slightly familiar with jQuery.