I use default code to apply for all website have tag img or attribute is tootltip and title

1. $(document).tooltip({
2. track: true,
3. items: "img, [tooltip], [title]",
4. content: function() {
5. var element = $( this );
6. if ( element.is("[tooltip]") ) {
7. var src = element.attr("tooltip");
8. return "<img src='" + src + "' width='100'>";
9. }
10. if ( element.is( "[title]" ) ) {
11. return element.attr( "title" );
12. }
13. if ( element.is( "img" ) ) {
14. return element.attr( "alt" );
15. }   
16. }
17. });

but in the some cases, I want to change position for another tag name
Example: with tags that have class="custome" it's will be change another position my and at, converse it's use default position. How to do it?

Sr, my english is not good