function OpenWindow(arg1, arg2, arg3) {

    TWindow = window.open(arg1, arg2, arg3);

    if (TWindow.focus == false) { 
        TWindow.focus();
    }

    if(!TWindow || !TWindow.top) { 
        alert("StrategyTools.org attempted to launch the Tool Editor in a new window but was blocked by your browser's pop-up blocker."); 
    }

}