function NewImage(arg)
  {
  if(document.images)
    {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
    }//end of if
  }//end of NewImage() 

function PreloadImages_Header()
  {
  //if(document.images) 
    {    
    chtcherbaPicture = NewImage("images/ac.jpg");
    linksPicture = NewImage("images/pictures/links.jpg");
        
    imagesPreloaded = true;
    }//end of if
  menuPictureFrame="left"; 
  menuImage="menuimg"; 
  }//end of PreloadImages_Header()

function PreloadImages_Menu()
  {
  //if(document.images) 
    {
    researchImage = NewImage("images/res.gif");
    publicationsImage = NewImage("images/publ.gif");
    presentationImage = NewImage("images/pres.gif");
    projectsImage = NewImage("images/proj.gif");
    linksImage = NewImage("images/links.gif");
    teachingImage = NewImage("images/teach.gif");
    coursesImage = NewImage("images/courses.gif");
    studentsImage = NewImage("images/stud.gif");
    officeHoursImage = NewImage("images/offhours.gif");
    advisingImage = NewImage("images/advising.gif");
    gradesImage = NewImage("images/grades.gif");
    
    researchImageOver = NewImage("images/res-over.gif");
    publicationsImageOver = NewImage("images/publ-over.gif");
    presentationImageOver = NewImage("images/pres-over.gif");
    projectsImageOver = NewImage("images/proj-over.gif");
    linksImageOver = NewImage("images/links-over.gif");
    teachingImageOver = NewImage("images/teach-over.gif");
    coursesImageOver = NewImage("images/courses-over.gif");
    studentsImageOver = NewImage("images/stud-over.gif");
    officeHoursImageOver = NewImage("images/offhours-over.gif");
    advisingImageOver = NewImage("images/advising-over.gif");
    gradesImageOver = NewImage("images/grades-over.gif");
    
    chtcherbaPicture = NewImage("images/ac.jpg");
    researchPicture = NewImage("images/pictures/research.jpg");
    publicationsPicture = NewImage("images/pictures/publications.jpg");
    presentationPicture = NewImage("images/pictures/presentation.jpg");
    projectsPicture = NewImage("images/pictures/projects.jpg");
    linksPicture = NewImage("images/pictures/links.jpg");
    teachingPicture = NewImage("images/pictures/teaching.jpg");
    coursesPicture = NewImage("images/pictures/courses.jpg");
    studentsPicture = NewImage("images/pictures/students.jpg");
    officeHoursPicture = NewImage("images/pictures/officehours.jpg");
    advisingPicture = NewImage("images/pictures/advising.jpg");
    gradesPicture = NewImage("images/pictures/grades.jpg");
    
    imagesPreloaded = true;
    }//end of if
  menuPictureFrame="left"; 
  menuImage="menuimg"; 
  }//end of PreloadImages()

//changes the image in the left frame
function ChangeLeftFamePicture(pictureObject)
  {
  if(document.images && imagesPreloaded)
    {
    parent.frames[menuPictureFrame].document.images[menuImage].src = pictureObject.src
    }//end of if
  }//end of ChangeMenuFramePicture()

function ChangeImage(imageName, fileName)
  {
  if(document.images && imagesPreloaded)
    {
    document[imageName].src = fileName.src;
    }//end of if
  }//end of ChangeImage()

//PreloadImages();