  if(!node) { return null; } if(tagName) { tagName = tagName.toLowerCase(); } do { node = node.previousSibling; } while(node && node.nodeType != dojo.dom.ELEMENT_NODE); 
  if(!node) { return null; } if(tagName) { tagName = tagName.toLowerCase(); } do { node = node.previousSibling; } while(node && node.nodeType != dojo.dom.ELEMENT_NODE); 
dojo.dom.prevElement = dojo.dom.getPreviousSiblingElement = function(/* Node */node, /* string? */tagName){	//	summary:	//		returns the previous sibling element matching tagName	if(!node) { return null; }	if(tagName) { tagName = tagName.toLowerCase(); }	do {		node = node.previousSibling;	} while(node && node.nodeType != dojo.dom.ELEMENT_NODE);	if(node && tagName && tagName.toLowerCase() != node.tagName.toLowerCase()) {		return dojo.dom.prevElement(node, tagName);	}	return node;	//	Element}
6315	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6315/2f1d2cb699c9d9329e8b782b0463156e211cb0f6/struts_dojo.js.uncompressed.js/buggy/src/main/resources/org/apache/struts2/static/dojo/struts_dojo.js.uncompressed.js