jscript, WHS, WScript-how to detect if IE instance exists

Hello Experts:
I have jscript code that uses WScript to create an instance of IE and navigates to a specific URL on the localhost:

objIE = WScript.CreateObject("InternetExplorer.Application);
objIE.Visible = 0;

I want to make it visible depending upon other conditions, but my big problem is that I don't want to create another one if objIE already exists

How can I detect if objIE already exists?  Also where can I find a list of properties, such as the Navigate and Visible?  I tried objIE.Exists, hoping, but that is not one of them.  All I find searching is VB examples.

Also I have tried if(objIE) {
 but this just stops the script execution..  

This is jscript, on Windows XP.

Please help!!!!!
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ZvonkoSystems architectCommented:
Michel PlungjanIT ExpertCommented:
An I suggest you do

var objIE=null; // make it global

function getIE() {
    if (objIE == null) objIE = WScript.CreateObject("InternetExplorer.Application);
    return objIE;

and use it later for example:

function something() {
  objIE = getIE(); // gets existing or creates a new
  objIE.Visible = 0;

in function something, the name of the object does not need to be objIE:

function something() {
  myIE = getIE(); // gets existing or creates a new
  myIE.Visible = 0;

will work too

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