function getElemText(node){
	    return node.text || node.textContent || (function(node){
	        var _result = "";
	        if (node == null) {
	            return _result;
	        }
	        var childrens = node.childNodes;
	        var i = 0;
	        while (i < childrens.length) {
	            var child = childrens.item(i);
	            switch (child.nodeType) {
	                case 1: // ELEMENT_NODE
	                case 5: // ENTITY_REFERENCE_NODE
	                    _result += arguments.callee(child);
	                    break;
	                case 3: // TEXT_NODE
	                case 2: // ATTRIBUTE_NODE
	                case 4: // CDATA_SECTION_NODE
	                    _result += child.nodeValue;
	                    break;
	                case 6: // ENTITY_NODE
	                case 7: // PROCESSING_INSTRUCTION_NODE
	                case 8: // COMMENT_NODE
	                case 9: // DOCUMENT_NODE
	                case 10: // DOCUMENT_TYPE_NODE
	                case 11: // DOCUMENT_FRAGMENT_NODE
	                case 12: // NOTATION_NODE
	                // skip
	                break;
	            }
	            i++;
	        }
	        return _result;
	    }(node));
	}