// First things for onLoad function call var available_width ; var available_height; if(document.images) { il = new Image(); il.src = "images/gfleft.gif"; ir = new Image(); ir.src = "images/gfright.gif"; } function firstThings() // to be executed in { } function secondThings() // to be done just after stuff { if(is_ns4up) { available_width = innerWidth; available_height = innerHeight; } else if(is_ie4up) { available_width = document.body.clientWidth; available_height = document.body.clientHeight; } } // Utility functions function writeImage(image, width, height) { document.write('

'); } function swapImages(objl, objr, imgl, imgr) { if(document.images) { objl.src = imgl; objr.src = imgr; } }