how to find value without RB in web_reg_save_param

I have got data from view source like this:

<PRE>
Number of connections in free list: 39
Number of connections in use: 3
-------------------------------

I need to extract 39 from above code, I used </BR> and also used "Number of" as RB below function still I am not able to takeout 39, can anyone comment on this

 web_reg_save_param("free_list",
 "LB=<PRE>Number of connections in free list: ",
 "RB=</BR>",
 LAST);