add some new helper methods

node.go

@@ -395,6 +395,26 @@ func rec_SelectNodes(cn *Node, namespace, name string, list *[]*Node, recurse bo
 	}
 }
 
+func (this *Node) RemoveNameSpace() {
+	this.Name.Space = ""
+}
+
+func (this *Node) SetAttr(name, value string) {
+	for _, v := range this.Attributes {
+		if name == v.Name.Local {
+			v.Value = value
+			return
+		}
+	}
+	//Add
+	attr := new(Attr)
+	attr.Name.Local = name
+	attr.Name.Space = ""
+	attr.Value = value
+	this.Attributes = append(this.Attributes, attr)
+	return
+}
+
 // Convert node to appropriate []byte representation based on it's @Type.
 // Note that NT_ROOT is a special-case empty node used as the root for a
 // Document. This one has no representation by itself. It merely forwards the