#demoIzq{ border:1px dashed; width:450px; background-color:#EAEAEA; text-align:center; }
#demoDer { border:1px dashed; width:200px; background-color:#EAEAEA; text-align:center; }
#demoDer { float:right; }
.select { width:400px; }
.select2 { width:150px; }