function imagem(){
var titulo = document.formname.titulo.value;
var blog = document.formname.blog.value;
var button = document.formname.but.value;

document.formname.gencode.value= '<div align="left"><a href="'+blog+'"target="_blank">'+
'<img src="'+button+'" border="0"></a></div>'
}

function MM_callJS(jsStr) { //v2.0
  return eval(jsStr)
}