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GetElementsByClassName (by brito)

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  1. document.getElementsByClassName = function(searchClass, node, tag){
  2. 	var classElements = [];
  3. 	node = node || document;
  4. 	var pattern = new RegExp('(^|\\s)' + searchClass+ '(\\s|$)');
  5. 	var els = (!tag && node.all) || node.getElementsByTagName(tag || '*');
  6. 	var elsLen = els.length;
  7. 	for (var i=0, j=0;i<els.length;i++) {
  8. 		if (pattern.test(els[i].className)) {
  9. 			classElements[j] = els[i];
  10. 			j++;
  11. 		}
  12. 	}
  13. 	return classElements;
  14. }

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