hi~ 
  
if  u want to Different Datalabel Different Font Style , 
i have one idea. 
  
code: 
  
  "styles": { "definition": [  
  { "name": "myHTMLFont", "type": "font", "ishtml": "1"}  ],  
  "application": [  
  { "toobject": "DATALABELS", "styles": "myHTMLFont" },  
  { "toobject": "TOOLTIP", "styles": "myHTMLFont" } ] }, 
  
  
then if i push data 
  
  var data={}; 
  var t=parseFloat(width)/fvObj.getItemCount(); 
  data["x"]=t*i+t/2; 
  data["y"]="220"; 
  data["width"]="100"; 
  data["height"]="70"; 
  data["color"]="62D0FE"; 
  data["name"]="<font color='red'>"+fvObj.getItemText("szName",i)+"</font>"; 
  data["alpha"]="100"; 
  data["tooltext"]=fvObj.getItemText("szName",i); 
  data["id"]=fvObj.getItemText("GroupID",i); 
  retObj.dataset[0].data.push(data); 
  
  var ammeter={}; 
  ammeter["x"]=t*i+t/2-30; 
  ammeter["y"]="90"; 
  ammeter["width"]="60"; 
  ammeter["height"]="65"; 
  ammeter["imagenode"]="1"; 
  ammeter["imageurl"]="resources/swf/ammeter.jpg"; 
  ammeter["labelalign"]= "BOTTOM"; 
  ammeter["imagealign"]= "top"; 
  ammeter["alpha"]= "1"; 
  ammeter["imagewidth"]= "40"; 
  ammeter["imageheight"]="40"; 
  ammeter["color"]="FE9191"; 
  ammeter["name"]="<font color='blue'>"+dayAEnergy.toFixed(0)+"度</font>"; 
  ammeter["id"]=fvObj.getItemText("GroupID",i)+"a"; 
  retObj.dataset[0].data.push(ammeter); 
  
  
but it useless  :(  :(  
  
  
Why? 
  
set isHtml='1' 
but html tag is useless