Using a custom look up to return Product Name to an Opportunity Product Revenue edit screen

I created a webkink field to launch a custom product search dashboard from inside an Opportunity Product Revenue edit screen. The java script is inside a narrative view in the report. The script returns the Product Name (also the Product ID for good measure) and places it in the Product Name field on the calling edit screen, but after a split second, a new Opportunity Product Revenue edit screen is opened and overwrites the launching screen wiping out the returned parameters. How can I stop this from happening?