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Posted By

jatkins on 03/28/11


Tagged

element DOM


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Find an element higher in the DOM hierarchy

 / Published in: JavaScript
 

Released into the public domain. startElmnt is a reference to the lower element, e.g. document.getElementById('tdName') and endElmntTagName is just that (capitalization irrelevant, thanks to Sitepoint), e.g. TBODY.

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  1. function upTo(startElmnt, endElmntTagName) {
  2. 	startElmntTagName = startElmnt.nodeName.toLowerCase();
  3. 	endElmntTagName   = endElmntTagName.toLowerCase();
  4. 	if(startElmntTagName != endElmntTagName) {
  5. 		while(startElmntTagName != endElmntTagName&&startElmnt.parentNode) {
  6. 			startElmnt        = startElmnt.parentNode;
  7. 			startElmntTagName = startElmnt.nodeName.toLowerCase();
  8. 		}
  9. 	}
  10. 	return startElmntTagName == endElmntTagName ? startElmnt : false;
  11. }

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