http://snippets.dzone.com/posts Sat, 17 May 2008 22:04:19 GMT DZone Snippets: paternity code http://snippets.dzone.com/posts/show/1859 // object paternity in Javascript <br /> <br /><code> <br />// relationship of object 1 to object 2 <br />function objectPaternity(obj1, obj2) { <br /> // given an object this function returns 'child' if obj1 is a child of obj2 <br /> // and 'parent' if obj1 is a parent of obj2 - then 'no' if neither <br /> var relationship = 'no'; <br /> var currentElement = obj1; <br /> <br /> while((typeof currentElement.parentNode != 'undefined') && (currentElement != document.body)) { <br /> // first cycle through all the parent elements of object 1 to see if object 2 is one of them <br /> if(currentElement.parentNode == obj2) { <br /> relationship = 'child'; <br /> } <br /> // walk up the tree and try again <br /> currentElement = currentElement.parentNode; <br /> } <br /> // if object 1 is not a child of object 2 then we test the other way arround <br /> if(relationship == 'no') { <br /> currentElement = obj2; <br /> while((typeof currentElement.parentNode != 'undefined') && (currentElement != document.body)) { <br /> // now cycle through all the parent elements of object 2 to see if object 1 is one of them <br /> if(currentElement.parentNode == obj1) { <br /> relationship = 'parent'; <br /> } <br /> // walk up the tree and try again <br /> currentElement = currentElement.parentNode; <br /> } <br /> } <br /> return relationship; <br />} <br /></code> Fri, 07 Apr 2006 17:07:57 GMT http://snippets.dzone.com/posts/show/1859 nataliedowne (Natalie Downe)