You can try to use QSBridge.ShowHTML
This will only work if you want to open the page where the transaction screen is....
Here is a a sample function you could link to
function openPage(url)
{
var QSRules = qsBridge.RequestQSRules();
if (QSRules == null)
return(0);
qsBridge.ShowHTML(url);
}
I haven't tested this but it should work