If you click but nothing happens, try right-mouse-clicking on the hyperlink above, then choosing "Save As..." or "Download Linked File As..." from the resulting popup menu, selecting "Desktop" from the resulting Save As dialog box. At that point, a file named "MembershipForm.pdf" will appear on your desktop. Double-click it to open it in Acrobat. In Acrobat, chose Print from the File menu. If double-clicking the file doesn't work, you might need Adobe Acrobat Reader installed on your computer. Get it here.
(if you can't get the Printable Form to work, for example, if you don't have Adobe Acrobat Reader available because this is a public shared computer, click here)