js code to determine whether an element is a child element of another element_javascript skills

Of course, there are many methods, but I personally think that judging whether an element is a child element of another element is one of the simplest ways to implement it.
Stop talking nonsense and get straight to the method:

Copy code The code is as follows:

function isParent (obj,parentObj){
while (obj != undefined && obj != null && obj.tagName.toUpperCase() != 'BODY'){
if (obj == parentObj){
return true;
}
obj = obj.parentNode;
}
return false;
}

View demo: http://demo. jb51.net/js/2012/isParent/
Thank you hafeyang for your message. There are also methods related to js to determine whether an element is a child element of another element. There is also the contains method. You can read Situ Zhengmei’s articlehttp://www.jb51.net/article/26158.htm