// JavaScript Document
function enfocar() {
        var sfEls = document.getElementsByTagName("INPUT");
        for (var i=0; i<sfEls.length; i++) {
                sfEls[i].onfocus=function() {
                        this.className+=" sffocus";
                }
                sfEls[i].onblur=function() {
                        this.className=this.className.replace(new RegExp(" sffocus\\b"), "");
                }
        }
}