document.body.styl1.cursor Not working as expected

I have a function that reads a table and writes a .csv file. Since some of the tables being read are sizeable, a minute or so can pass before the write is complete and the file is opened in Excel. I want to change the cursor so that it equals "wait" why the operation is running. Per the following code, the cursor changes AFTER the write is complete. Why? How can I change this behavior?

function WriteToFile(tableID) {
document.body.style.cursor="wait";
try {
var fso, s;
fso = new ActiveXObject("Scripting.FileSystemObject");
s = fso.OpenTextFile("C:\ice_temp.csv",2,1,-2);
s.writeline("ICE_grpmth Report - Function Code Groups by Month - Hours");
s.writeline("For Program(s): THAAD (Terminal High Altitude Area Defense)");
s.writeline("Report Date: January 18 2005 14:35");
var i;
var j;
var fileline = "";
var mycell;
for (i=0; i < document.getElementById(tableID).rows.length; i++) {
for (j=0; j < document.getElementById(tableID).rows(i).cells.length; j++){
mycell = document.getElementById(tableID).rows(i).cells(j)
fileline = fileline + "\"" + mycell.innerText + "\",";
}
s.writeline(fileline);
fileline = "";
}
s.Close();
var myshell = new ActiveXObject("WScript.shell");
myshell.run("C:\ice_temp.csv");
}

You will have to put a function in to change the cursor, then call the function that will do the processing in a setTimout. Otherwise, the cursor changes at the start of the code, executes the rest of the code and chages the cursor back, never reflecting the changed cursor to the user.

Basscyst

Basscyst is correct. You can also try this without creating another function.

function WriteToFile(tableID) {
setTimeout("document.body.style.cursor='wait'", 1);
try {
...
}