var extra = =;
var extraen = encodeURIComponent(extra);
var src = "http://st.snick.me/j/botao?url=" + extraen;
function botao() { 
   var ifrm = document.createElement('iframe');
   ifrm.setAttribute("src", src); 
   ifrm.style.width = 50+"px"; 
   ifrm.style.height = 70+"px";
   ifrm.style.border = 0; 
   document.body.appendChild(ifrm);
}
write(botao());