If you want to implement a javascript interface probably you will get to a point where you have to know witch button was pressed. The next code will detect correctly for IE, Firefox, Chrome, Opera and Safari.
/* this will append click detection to whole document
* if you want to add this feature just on one area
* just change the selector for the jQuery
*/
jQuery(document).click(function(event) {
if (jQuery.browser.msie){
if (event.which < 2){
alert('Left button');
}
}else
switch (event.which) {
case 1:
alert('Left button');
break;
case 2:
alert('Middle button');
break;
case 3:
alert('Right button');
break;
default:
alert('unknown');
}
});