//replaces the main image with the selected (imgName) image
         function showCab(imgName)
         {
            //the image that will be replaced
            var img;
            
            img = document.getElementById("mainImg");
            
            //set the image to be the selected image
            img.src = "images/" + imgName;

            
         }//end of function
         
         //changes the mouse pointer to that of what a hyperlink would look like
         function makeHyperlinkPointer()
         {
            document.body.style.cursor='pointer';
         }//end of function
         
         //changes the mouse pointer to the normal version
         function makeNormalPointer()
         {
            document.body.style.cursor='default';
         }//end of function