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Sort Element Array by DOM Position

/ Published in: JavaScript
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This function will sort an array of DOM elements in order of the DOM position. Useful when using calls such as $$("img.L,img.M") which doesn;t return a sorted element array.

It uses prototype but you can replace the Prototype.Browser stuff with anything else.

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Copy this code and paste it in your HTML 
  1. var DOMPositionComparator = function(a,b){
  2. 	if(Prototype.Browser.IE){
  3. 		return a.sourceIndex - b.sourceIndex;
  4. 	}else if(Prototype.Browser.Gecko){
  5. 		return 3 - (a.compareDocumentPosition(b) & 6);
  6. 	}
  7. };
  8.  
  9. var sortedFields = $$('img.L,img.M').sort(DOMPositionComparator);

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