YAHOO.util.Event.addListener(window,"load",

function(){

                     YAHOO.util.Event.addListener("email","focus",

                            focus_email = function(){
                                    var el = document.getElementById("email");
                                    if(el.value == "email") { el.value = ""; }
                             } );

                     YAHOO.util.Event.addListener("zip","focus",

                            focus_zip = function(){
                                    var el = document.getElementById("zip");
                                    if(el.value == "zip") { el.value = ""; }
                             } );



                     YAHOO.util.Event.addListener("email","blur",

                            focus_email = function(){
                                    var el = document.getElementById("email");
                                    if(el.value == "") { el.value = "email"; }
                             } );

                     YAHOO.util.Event.addListener("zip","blur",

                            focus_zip = function(){
                                    var el = document.getElementById("zip");
                                    if(el.value == "") { el.value = "zip"; }
                             } );
}

);