How can I check to see if a website exists before receiving an error?

Question

I am trying to create a script that will pull data from different websites.  I would like to test if a website exists and if not, then move on to another website.  With my current code, if the site does not exist I get a pop up error reading, "Cannot open table in access or evaluation of 'Open' , Open( Full_EI_WEB_Sites[1], invisible, HTML Table( 1 ) )".

Is there something similar to the File Exists() function, but for opening websites?

Thanks

Byron_JMP · Accepted Answer

Maybe try the Try(expr, catch expr) function. If the second argument is not included, then the script just runs when the expression throws an error.

bad=expr(dt1=open("not a file.txt"));

good=expr(today());

try(bad,show("bad ran"));

try(good,show("good ran"));