// Author: David Hedstrom // Description: JavaScript slideshow functions // preLoadImages should go in // other functions should go in // slideshow image should be named main_img var IMAGES = 10; var FILEBASE = "images/"; var FILEEXT = ".gif"; var MILLISECONDS = 500; var img_array; var current_img = 0; var timer_id = 0; function preLoadSlides() { var i; var n; var str; img_array = new Array(); for( i = 0; i < IMAGES; i++ ) { //pad with 0's n = i + 1; str = n.toString(); while(str.length < 3) str = "0" + str; img_array[i] = new Image(); img_array[i].src = FILEBASE + str + FILEEXT; } } function onNext() { current_img = current_img + 1; if( current_img > (IMAGES-1)) { current_img = 0; } document.main_img.src = img_array[current_img].src; } function onPrev() { current_img = current_img - 1; if( current_img < 0) { current_img = IMAGES-1; } document.main_img.src = img_array[current_img].src; } function goTo(index) { current_img = index-1; document.main_img.src = img_array[current_img].src; } function onPlay() { clearTimeout(timer_id); current_img = current_img + 1; if( current_img > (IMAGES-1)) { current_img = 0; } document.main_img.src = img_array[current_img].src; timer_id = setTimeout("onPlay()", MILLISECONDS); } function onPause() { clearTimeout(timer_id); } function onStop() { goTo(1); clearTimeout(timer_id); }