getURL opens two browsers on few machines

Hi All,

I have one query. I am using getURL to open a link in new browser window. On few machines onRelease of mouse button it is opening two browser windows. I checked this for IE6 and IE7. It is giving problem on the machine where JRE 1.6.0 is installed and working fine on **JRE 1.5.0_06. **Can any one help me to resolve this problem.