<!---
    var NextButtonImage = new Array() ;
    var BackButtonImage = new Array() ;
    var UpButtonImage = new Array() ;
    for (i = 1; i < 3; i++) {
        NextButtonImage[i] = new Image() ;
        NextButtonImage[i].src = "nextb" + i + ".gif"
        BackButtonImage[i] = new Image() ;
        BackButtonImage[i].src = "backb" + i + ".gif"
        UpButtonImage[i] = new Image() ;
        UpButtonImage[i].src = "upb" + i + ".gif"
    }
    function SetNextButton(flag, position) {
            document.images[position].src = NextButtonImage[flag].src ;
    }
    function SetBackButton(flag, position) {
            document.images[position].src = BackButtonImage[flag].src ;
    }
    function SetUpButton(flag, position) {
            document.images[position].src = UpButtonImage[flag].src ;
    }
//--->