$(document).ready(function(){
    $.fn.hasParent = function(objs) {
	    // ensure that objs is a jQuery array
	    objs = $(objs); var found = false;
	    $(this[0]).parents().andSelf().each(function() {
		    if ($.inArray(this, objs) != -1) {
			    found = true;
			    return false; // stops the each...
		    }
	    });
	    return found;
    }
});