Digital character mixed verification code implemented by ASP

' Generate a 4-digit random code first.

Ychar= "0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z"
Yc=split (Ychar, ",")
Ynum=4 ' The random code digits here can be changed
For I=1 to Ynum
Randomize
YCODE=YCODE&YC (Int ((35*RND))
Next

' Display random code to a specific location, and then use a hidden text box in the form to set the initial value to that random code

Then get the user's username, password, fill in the random code, as well as the user name and password verification of their own, get the random code and hidden box in the random code inconsistency is an error.