var NoOffFirstLineMenus=8;                        // Number of first level items
        var LowBgColor='#000040';                        // Background color when mouse is not over
        var LowSubBgColor='#000040';                        // Background color when mouse is not over on subs
        var HighBgColor='#000050';                        // Background color when mouse is over
        var HighSubBgColor='#000050';                        // Background color when mouse is over on subs
        var FontLowColor='9C9EF8';                        // Font color when mouse is not over
        var FontSubLowColor='9C9EF8';                        // Font color subs when mouse is not over
        var FontHighColor='9C9EF8';                        // Font color when mouse is over
        var FontSubHighColor='9C9EF8';                        // Font color subs when mouse is over
        var BorderColor='black';                        // Border color
        var BorderSubColor='black';                        // Border color for subs
        var BorderWidth=1;                                // Border width
        var BorderBtwnElmnts=1;                        // Border between elements 1 or 0
        var FontFamily="verdana"        // Font family menu items
        var FontSize=7.5;                                // Font size menu items
        var FontBold=0;                                // Bold menu items 1 or 0
        var FontItalic=0;                                // Italic menu items 1 or 0
        var MenuTextCentered='left';                        // Item text position 'left', 'center' or 'right'
        var MenuCentered='left';                        // Menu horizontal position 'left', 'center' or 'right'
        var MenuVerticalCentered='top';                // Menu vertical position 'top', 'middle','bottom' or static
        var ChildOverlap=.2;                                // horizontal overlap child/ parent
        var ChildVerticalOverlap=.2;                        // vertical overlap child/ parent
        var StartTop=0;                                // Menu offset x coordinate
        var StartLeft=0;                                // Menu offset y coordinate
        var VerCorrect=0;                                // Multiple frames y correction
        var HorCorrect=0;                                // Multiple frames x correction
        var LeftPaddng=3;                                // Left padding
        var TopPaddng=2;                                // Top padding
        var FirstLineHorizontal=0;                        // SET TO 1 FOR HORIZONTAL MENU, 0 FOR VERTICAL
        var MenuFramesVertical=1;                        // Frames in cols or rows 1 or 0
        var DissapearDelay=1000;                        // delay before menu folds in
        var TakeOverBgColor=1;                        // Menu frame takes over background color subitem frame
        var FirstLineFrame='navig';                        // Frame where first level appears
        var SecLineFrame='space';                        // Frame where sub levels appear
        var DocTargetFrame='space';                        // Frame where target documents appear
        var TargetLoc='MenuPos';                                // span id for relative positioning
        var HideTop=0;                                // Hide first level when loading new document 1 or 0
        var MenuWrap=1;                                // enables/ disables menu wrap 1 or 0
        var RightToLeft=0;                                // enables/ disables right to left unfold 1 or 0
        var UnfoldsOnClick=0;                        // Level 1 unfolds onclick/ onmouseover
        var WebMasterCheck=0;                        // menu tree checking on or off 1 or 0
        var ShowArrow=1;                                // Uses arrow gifs when 1
        var KeepHilite=1;                                // Keep selected path highligthed
        var Arrws=['arrow.gif',12,11,'arrow.gif',12,11,'arrow.gif',12,11];        // Arrow source, width and height

function BeforeStart(){return}
function AfterBuild(){return}
function BeforeFirstOpen(){return}
function AfterCloseAll(){return}


// Menu tree
//        MenuX=new Array(Text to show, Link, background image (optional), number of sub elements, height, width);
//        For rollover images set "Text to show" to:  "rollover:Image1.jpg:Image2.jpg"

Menu1=new Array("[1] Introduction to Light","introduction_to_light.html","",0,20,182);


Menu2=new Array("[2] Behaviours of Light","introduction_behaviours.html","",5);
        Menu2_1=new Array("Introduction","introduction_behaviours.html","",0,20,150);
        Menu2_2=new Array("The Ray Model of Light","ray_model.html","",0);
	  Menu2_3=new Array("The Wave Model of Light","wave_model.html","",0);
	  Menu2_4=new Array("Reflection","reflection.html","",0);
	  Menu2_5=new Array("Refraction","refraction.html","",0);


Menu3=new Array("[3] Sources of Light","introduction_sources.html","",0);


Menu4=new Array("[4] Colours","introduction_colours.html","",4);
        Menu4_1=new Array("Introduction","introduction_colours.html","",0,20,150);
        Menu4_2=new Array("Causes of Colours","causes_of_colours.html","",0);
        Menu4_3=new Array("The Solar Spectrum","the_solar_spectrum.html","",0);
        Menu4_4=new Array("The Primary Colours","the_primary_colours.html","",0);

Menu5=new Array("[5] Electromagnetic Spectrum","introduction_electromagnetic_spectrum.html","",2);
        Menu5_1=new Array("Introduction","introduction_electromagnetic_spectrum.html","",0,20,150);
        Menu5_2=new Array("Types of Waves","types_of_waves.html","",0);


Menu6=new Array("[6] My Experiment","introduction_experiment.html","",2);
        Menu6_1=new Array("Introduction","introduction_experiment.html","",0,20,150);
        Menu6_2=new Array("Write up of Experiment","write_up.html","",0);

Menu7=new Array("[7] About This Site","about_site.html","",4);
        Menu7_1=new Array("About This Site","about_site.html","",0,20,150);
        Menu7_2=new Array("Programs Used","programs_used.html","",0);
        Menu7_3=new Array("Bibliography","bibliography.html","",0);
	  Menu7_4=new Array("Project Info","projectinfo.html","",0);

Menu8=new Array("Home","index.html","",0);