$(document).ready(function(){

    $("ul.ul_header_menu>li").hover( function(){
        $(this).children("ul.ul_expandable_first").css("display","block");
    },function(){
        $(this).children("ul.ul_expandable_first").css("display","none");
    });

    $("ul.ul_expandable_first>li").hover( function(){
        $(this).children("ul.ul_expandable_second").css("display","block");
    },function(){
        $(this).children("ul.ul_expandable_second").css("display","none");
    });


});

function focus_username_field(elem){
    if(elem.value=="Username"){
      elem.value='';
    }
}

function blur_username_field(elem){
  if(elem.value==""){
    elem.value='Username';
  }
}

function focus_password_field(elem){
  if(elem.value=='Password_User'){
    elem.value='';
  }
}

function blur_password_field(elem){
  if(elem.value==""){
    elem.value="Password_User";
  }
}

function focus_search_field(elem){
  if(elem.value=='Type and press Enter'){
    elem.value='';
  }
}

function blur_search_field(elem){
  if(elem.value==""){
    elem.value="Type and press Enter";
  }
}