var txt1;
var txt2;
var txt3;
var txt4;
var main;
function rollout(obj)
{

document.images['b1'].src = txt1;
document.images['b2'].src = txt2;
document.images['b3'].src = txt3;
document.images['b4'].src = txt4;
document.images['imgname'].src = main;
}
function rollover(obj)
{
document.images['b1'].title="ОБ ОТЕЛЕ";
document.images['b2'].title="КОНТАКТЫ";
document.images['b3'].title="ЗАКАЗ";
document.images['b4'].title="КВАРТИРЫ";
document.images['b1'].alt="ОБ ОТЕЛЕ";
document.images['b2'].alt="КОНТАКТЫ";
document.images['b3'].alt="ЗАКАЗ";
document.images['b4'].alt="КВАРТИРЫ";
txt1 = document.images['b1'].src;
txt2 = document.images['b2'].src;
txt3 = document.images['b3'].src;
txt4 = document.images['b4'].src;
  main = document.images["imgname"].src;

  var imgsrc = "";
  var imgsrcmain = "";
 if (document.images[obj].name == 'b1')
    {
    imgsrc = "images/but_1.gif"
    imgsrcmain = "images/b_1.gif"
    }
 if (document.images[obj].name == 'b2')
    {
    imgsrc = "images/but_2.gif"
    imgsrcmain = "images/b_2.gif"
    }
 if (document.images[obj].name == 'b3')
    {
    imgsrc = "images/but_3.gif"
    imgsrcmain = "images/b_3.gif"
    }
 if (document.images[obj].name == 'b4')
    {
    imgsrc = "images/but_4.gif"
    imgsrcmain = "images/b_4.gif"
    }
    document.images["b1"].src= "images/but_off.gif"
    document.images["b2"].src= "images/but_off.gif"
    document.images["b3"].src= "images/but_off.gif"
    document.images["b4"].src= "images/but_off.gif"
   
    document.images[obj].src = imgsrc;
    document.images["imgname"].src = imgsrcmain;
}