Example show Javascript

example.js

$("a.tab").click(function(event){

 event.preventDefault();

 var id = $(this).attr('id'); // gets the ID of whatever you clicked on

 var a = id.split("_");  // a is now an array with 2 items ("link" and the number)

 var num = a[1]; // num is now the number of the "link_x" link that was clicked
 
 var target = "info_" + num.toString(); // appends the number to an "info_" string
 
 console.log(target);

 $("#" + target).show(); // shows the block

});