Executing a process and checking if it's still running

function IsProcessRunning(/**string|number*/ pidOrName)
{
    var strComputer = ".";
    var SWBemlocator = new ActiveXObject("WbemScripting.SWbemLocator");
    var objCtx = new ActiveXObject("WbemScripting.SWbemNamedValueSet")
    objCtx.Add("__ProviderArchitecture", 64);    
    var objWMIService = SWBemlocator.ConnectServer(strComputer, "/root/CIMV2", "", "", null, null, null, objCtx);
    
    var query = "Select * from Win32_Process";
    if(typeof(pidOrName) == "number")
    {
        query += " WHERE Handle=" + pidOrName;
    }
    else if (typeof(pidOrName) == "string")
    {
        query += " WHERE Name='" + pidOrName + "'";
    }
    var colItems = objWMIService.ExecQuery(query);
    
    var e = new Enumerator(colItems);
    for(; ! e.atEnd(); e.moveNext())
    {
        Log(e.item().Handle + ":" + e.item().Name);
        if (pidOrName) return true;
    }
    
    if (pidOrName) return false;
}

Global.DoLaunch('iexplore.exe');
Log("PID: "+Global.lastPid+" Running: "+IsProcessRunning(Global.lastPid));