var $item = $('a[href="' + target + '"]').eq(link_index);

if($item.size() > 0){
	$item[0].click();
	//$item.trigger('click');//Doesn't work for unknown reason
	//window.open($item.attr('href')); //will be block by browsers
}

Reference:

1. http://stackoverflow.com/questions/5867370/trigger-click-jquery-not-working
2. http://stackoverflow.com/questions/773639/how-can-i-simulate-an-anchor-click-via-jquery/10559680#10559680