HTML, SVG or Canvas Labels?

HTML, SVG or Canvas Labels?

   1. //Add the name of the node in the correponding label  
   2. //and a click handler to move the graph.  
   3. //This method is called once, on label creation.  
   4. onCreateLabel: function(domElement, node){  
   5.     domElement.innerHTML = node.name;  
   6.     domElement.onclick = function(){  
   7.         rgraph.onClick(node.id);  
   8.     };  
   9. },  
  10. //Change some label dom properties.  
  11. //This method is called each time a label is plotted.  
  12. onPlaceLabel: function(domElement, node){  
  13.     var style = domElement.style;  
  14.     style.display = '';  
  15.     style.cursor = 'pointer';  
  16.   
  17.     if (node._depth <= 1) {  
  18.         style.fontSize = "0.8em";  
  19.         style.color = "#ccc";  
  20.   
  21.     } else if(node._depth == 2){  
  22.         style.fontSize = "0.7em";  
  23.         style.color = "#494949";  
  24.   
  25.     } else {  
  26.         style.display = 'none';  
  27.     }  
  28.   
  29.     var left = parseInt(style.left);  
  30.     var w = domElement.offsetWidth;  
  31.     style.left = (left - w / 2) + 'px';  
  32. }