Problem in Selenium TestCase

[syruss kumar]

Hi All,

I have written a selenium test case i have to verify the content of Iframe in all browsers. While i selecting the Iframe using

selenium.selectFrame("index=1"); is working fine in IE but its giving frames[1] not found exception in firefox 

if i change the code like this
selenium.selectFrame("index=0");
 its working fine in Firefox 

Can any one help me to understand how selenium selecting the iframe

Thanks in advance,