If you want all the links on your page to open in a new window you
don't have to modify every one. It's a simple matter to apply a default
setting for the page so that all the links behave the same way. Here's
how: Insert the following code...
...into the header of your document's HTML (i.e. anywhere between the <head> and </head> tags but not inside any other pairs of tags already there). (http://www.fontstuff.com/frontpage/fptut05.htm )
Now, in blogspot you go to your template (which is html code) and insert <base target="_blank"> right after <head>