var path = "/images/";

     var first_off = new Image();
     first_off.src = path + "homeOff.jpg";
     var first_on = new Image();
     first_on.src = path + "homeOn.jpg";
     
     var second_off = new Image();
     second_off.src = path + "locationOff.jpg";
     var second_on = new Image();
     second_on.src = path + "locationOn.jpg";
     
     var third_off = new Image();
     third_off.src = path + "tariffOff.jpg";
     var third_on = new Image();
     third_on.src = path + "tariffOn.jpg";
     
     var forth_off = new Image();
     forth_off.src = path + "reserveOff.jpg";
     var forth_on = new Image();
     forth_on.src = path + "reserveOn.jpg";
     
     var fifth_off = new Image();
     fifth_off.src = path + "entertainOff.jpg";
     var fifth_on = new Image();
     fifth_on.src = path + "entertainOn.jpg";
     
     var sixth_off = new Image();
     sixth_off.src = path + "placesOff.jpg";
     var sixth_on = new Image();
     sixth_on.src = path + "placesOn.jpg";
     
     var seventh_off = new Image();
     seventh_off.src = path + "contactOff.jpg";
     var seventh_on = new Image();
     seventh_on.src = path + "contactOn.jpg";
     
     function activate(imgName) {
     if ( eval(imgName + "_on.complete") ) {
     document.images[imgName].src = eval(imgName + "_on.src");
     }
     }
     
     function deactivate(imgName) {
     if ( eval(imgName + "_off.complete") ) {
     document.images[imgName].src = eval(imgName + "_off.src");
     }
     }