/* For an splash page put the following line inside the BRC area LIMITS: Number of images: 4 per image The images must be named properly print1.jpg, print2.jpg, print3.jpg etc */ // this is same as putting in doc window.onload = init; var imgobjs = new Array(8); var imgids = ["ceramic", "charcoal", "drawing", "painting", "pastel", "print", "sculpture", "watercolor"]; var imgndx = [ 1, 1, 1, 1, 1, 1, 1, 1]; var imgtodo = new Array(8); // this is used as part of mechanism to guarantee all get switched var picprefix = "splash-"; var picdir = null; var timeID = 0; var MAXIMAGES = 5; // 5 images print1, print2, print3 var initialDelay = 5000; // 5 second initial delay var firstTime = true; var minInterval = 1000; // 1 second min delay between image switch var maxInterval = 3000; // 3 second max delay between image switch var doContinous = false; // Just run through the images once function init() { for (var i = 0; i < imgids.length ; i++) { imgobjs[i] = document.getElementById(imgids[i]+"img"); } resetImgTodo(); picdir = grabDir(imgobjs[0].src); startSwitch(); } function resetImgTodo() { for (var i = 0; i < imgids.length ; i++) { imgtodo[i] = i; } } function startSwitch() { var thisInterval = randInt(minInterval, maxInterval); if (firstTime) { thisInterval += initialDelay; firstTime = false; } timeID = setInterval("switchImage()", thisInterval); } function switchImage() { // clear interval clearInterval(timeID); timeID = 0; // if imgtodo array is depleted reset if (imgtodo.length == 0) { // see if reached end of graphic chains (assumed equal) if (imgndx[0] >= MAXIMAGES) { if (doContinous) { for (var i = 0; i < imgids.length ; i++) { imgndx[i] = 0; // set to 0 so we repaint the first image set too. } resetImgTodo(); } else { return; } } else { resetImgTodo(); } } var randndx; if (imgtodo.length == 1) { randndx = 0; } else { randndx = randInt(0, imgtodo.length-1); } // alert("randndx "+randndx); var thistodo = imgtodo.splice(randndx, 1); var nextimagendx = imgndx[thistodo] + 1; if (nextimagendx > MAXIMAGES) { if (doContinous) { nextimagendx = 1; } } // imgobjs[1].src = picdir + "charcoal2.jpg"; // alert(picdir + imgids[thistodo] + nextimagendx + ".jpg"); imgndx[thistodo] = nextimagendx; imgobjs[thistodo].src = picdir + picprefix + imgids[thistodo] + nextimagendx + ".jpg"; startSwitch(); } function randInt(lower, upper) { var range = upper - lower; var size = range + 1; return Math.floor( (Math.random() * size) + lower ); } function grabDir(instring) { var tmp; var ndx = instring.lastIndexOf("/"); if (ndx == -1) { return ""; } return instring.substring(0,ndx+1); }