Conditional Click Action With Multiple Selection

I'm trying to make a condition for the grid to open a window if a row is selected, but take no action if more than one row is selected (or if no rows are selected). I tried the selection count Property but that seems to execute after the click action, so its behind. This is what I have:

obj.setAction("click", function(src){
    var i = src.getProperty("item/index");
    if(obj.getSelectionProperty("count") == 1){
    window.open("preview.php?msg_id="+this.getDataProperty("text", i, 5),"preview");
    }
    });

As I said, this is always behind. For example, if I have one row selected, the condition will evaulate to true the NEXT click I make, regardless of what it is seeing as the previous count was 1.

Any help you could provide would be a miracle. I've pulled my hair out too long on this issue.

Thanks!

Selection is updated in response to click action (this is bad design on my side), so you should either introduce a delay or assign your handler to 'selectionChanged' action:

obj.setAction("selectionChanged", myFunction);

http://www.activewidgets.com/grid.howto.select/overview.html