Help with string test

[Eng Born]

I wrote this function many years ago.
str is 'h12'
y=get_row(str);
and it gave me y=0;
Can someone tell me how to fix this?

function get_row(str)
{
   var pat;
   var e;
   pat=/10/;
   if (pat.test(str)) return(9);
   pat=/11/;
   if (pat.test(str)) return(10);
   pat=/l2/;
   if (pat.test(str)) return(11);
   pat=/13/;
   if (pat.test(str)) return(12);
   pat=/14/;
   if (pat.test(str)) return(13);
   pat=/1/;
   if (pat.test(str)) return(0);
   pat=/2/;
   if (pat.test(str)) return(1);
   pat=/3/;
   if (pat.test(str)) return(2);
   pat=/4/;
   if (pat.test(str)) return(3);
   pat=/5/;
   if (pat.test(str)) return(4);
   pat=/6/;
   if (pat.test(str)) return(5);
   pat=/7/;
   if (pat.test(str)) return(6);
   pat=/8/;
   if (pat.test(str)) return(7);
   pat=/9/;
   if (pat.test(str)) return(8);
   return(-1);

[Dormilich]

pat = /12/;

(1, not l)

that function looks awfully complicated.

function get_row(str)
{
    return /\d+/.exec(str) - 1;
}

[Eng Born]

Thank you. It works.