zeros of product of bessel functions

[john]

Hi,

The following program works:

bessy0=@(x)bessely(0,x)
for n=1:5
z(n)=fzero(bessy0,[(n-1) n]*pi) 
z
this gives the first five zeros of Yo(x)

---------------
Now:
cross=@(x) besselj(0,x)*besseli(1,x)+besseli(0,x)*besselj(1,x)
fzero(eval("cross"),4)
gives 3,1962 for the first zero of this product.That's correct.
-----------------------

My question:

Is it possible to write a program like above  (bessely(0,x)) for the product
cross wich gives the first 5
zeros or first 3....??????

Thank you for your help

Kind regards
John

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