3 files changed, 21 insertions, 10 deletions

diff --git a/src/circle.js b/src/circle.js
index 7d1fbee..f2549c7 100644
--- a/src/circle.js
+++ b/src/circle.js
@@ -10,7 +10,7 @@ SVG.Circle.prototype = new SVG.Shape();
 SVG.Circle.prototype.move = function(x, y) {
   this.attributes.x = x;
   this.attributes.y = y;
-  this._center();
+  this.center();
   
   return this;
 };
@@ -18,15 +18,15 @@ SVG.Circle.prototype.move = function(x, y) {
 // custom size function
 SVG.Circle.prototype.size = function(w, h) {
   this.setAttribute('r', w / 2);
-  this._center();
+  this.center();
   
   return this;
 };
 
 // private: center 
-SVG.Circle.prototype._center = function() {
+SVG.Circle.prototype.center = function(cx, cy) {
   var r = this.attributes.r || 0;
   
-  this.setAttribute('cx', (this.attributes.x || 0) + r);
-  this.setAttribute('cy', (this.attributes.y || 0) + r);
+  this.setAttribute('cx', cx || ((this.attributes.x || 0) + r));
+  this.setAttribute('cy', cy || ((this.attributes.y || 0) + r));
 };
\ No newline at end of file
diff --git a/src/element.js b/src/element.js
index bf729cd..d6f4685 100644
--- a/src/element.js
+++ b/src/element.js
@@ -68,6 +68,17 @@ SVG.Element.prototype.setAttribute = function(a, v, ns) {
   return this;
 };
 
+// set svg element attribute
+SVG.Element.prototype.attr = function(v) {
+  if (typeof v == 'object')
+    for (var k in v)
+      this.setAttribute(k, v[k]);
+  else if (arguments.length == 2)
+    this.setAttribute(arguments[0], arguments[1]);
+  
+  return this;
+};
+
 // get bounding box
 SVG.Element.prototype.getBBox = function() {
   return this.svgElement.getBBox();
diff --git a/src/ellipse.js b/src/ellipse.js
index 9e03277..41443b9 100644
--- a/src/ellipse.js
+++ b/src/ellipse.js
@@ -10,7 +10,7 @@ SVG.Ellipse.prototype = new SVG.Shape();
 SVG.Ellipse.prototype.move = function(x, y) {
   this.attributes.x = x;
   this.attributes.y = y;
-  this._center();
+  this.center();
   
   return this;
 };
@@ -19,12 +19,12 @@ SVG.Ellipse.prototype.move = function(x, y) {
 SVG.Ellipse.prototype.size = function(w, h) {
   this.setAttribute('rx', w / 2);
   this.setAttribute('ry', h / 2);
-  this._center();
+  this.center();
   
   return this; 
 };
 
-SVG.Ellipse.prototype._center = function() {
-  this.setAttribute('cx', (this.attributes.x || 0) + (this.attributes.rx || 0));
-  this.setAttribute('cy', (this.attributes.y || 0) + (this.attributes.ry || 0));
+SVG.Ellipse.prototype.center = function(cx, cy) {
+  this.setAttribute('cx', cx || ((this.attributes.x || 0) + (this.attributes.rx || 0)));
+  this.setAttribute('cy', cy || ((this.attributes.y || 0) + (this.attributes.ry || 0)));
 };
\ No newline at end of file