Why are linkbuttons not grayed out when disabled in FireFox?

Question

Why when I set enabled=false on a button does it not render correctly in Firefox? Instead of graying out the link it is still blue.

[UPDATE]

ASP.net already rem

Answer 1

The solution below is for buttons not link but it can be done for link as well.

var obj = document.getElementById('buttonId'');
getLabel = function(elem){
if (elem.id && elem.id=="label") {
elem.id = "disabledLabel";
}
};            
Dom.getElementsBy(getLabel ,'td', obj);

This will show button as disable or grayed out.