hello.
Ok , i am a designer trying to use the most of JS.
Basically, my purpose is :
- to have a preloader for my page : a preload bar showing what is left before the page is loaded (because the page is about 300K)
- to use an image map with rollovers in the page, image map made in ImageReady with the automatic JS feature "preloadImages" for rollovers.
BUT, it seems there is a conflict btw the preload script and the preload of my images for the rollovers. The conflict is such as :
- if i don't call the preload bar the rollovers will work.
- i need the preload bar for the user to see smthg before the page is fully working, but then rollovers won't work...
So my question is : how do i make a imagemap with preloaded rollovers that will show up after a JS preload bar ?
If i "cut" the preload fonction of the rollovers they dont work anymore...
This must be a conflict btw the preloaded rollovers & and the preload bar but i dont know what i have to take out of these respective scripts to make it work.
I've search forums & tutorials without seeing this specific conflict, so i post here the codes :
- THE CODE FOR THE ROLLOVER IMAGEMAP PREALOADING, in the HEAD tag (made in ImageReady) :
function newImage(arg) {
if (document.images) {
rslt = new Image();
rslt.src = arg;
return rslt;
}
}
function changeImages() {
if (document.images && (preloadFlag == true)) {
for (var i=0; i<changeImages.arguments.length; i+=2) {
document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
}
}
}
var preloadFlag = false;
function preloadImages() {
if (document.images) {
index03_01_ImageMap_01_over = newImage("images/index03_01-ImageMap_01_over.jpg");
index03_01_ImageMap_06_over = newImage("images/index03_01-ImageMap_06_over.jpg");
index03_01_ImageMap_03_over = newImage("images/index03_01-ImageMap_03_over.jpg");
index03_01_ImageMap_04_over = newImage("images/index03_01-ImageMap_04_over.jpg");
index03_01_ImageMap_05_over = newImage("images/index03_01-ImageMap_05_over.jpg");
preloadFlag = true;
}
}
________________________________
this code is tirggered in the body : ONLOAD="preloadImages()"
________________________________
THEN, THE JS OF THE PRELAODER, called in the HEAD of the page with a src :
var imagenames=new Array( 'images/fond.jpg' , 'images/index03_01.jpg');
var yposition=250; //POSITION OF LOAD BAR FROM TOP OF WINDOW, IN PIXELS
var loadedcolor='gray' ; // PROGRESS BAR COLOR
var unloadedcolor='white'; // BGCOLOR OF UNLOADED AREA
var barheight=15; // HEIGHT OF PROGRESS BAR IN PIXELS (MIN 25)
var barwidth=350; // WIDTH OF THE BAR IN PIXELS
var bordercolor='black'; // COLOR OF THE BORDER
//DO NOT EDIT BEYOND THIS POINT
var NS4 = (navigator.appName.indexOf("Netscape")>=0 && parseFloat(navigator.appVersion) >= 4 && parseFloat(navigator.appVersion) < 5)? true : false;
var IE4 = (document.all)? true : false;
var NS6 = (parseFloat(navigator.appVersion) >= 5 && navigator.appName.indexOf("Netscape")>=0 )? true: false;
var imagesdone=false;
var blocksize=barwidth/(imagenames.length);
barheight=Math.max(barheight,25);
var loaded=0, perouter, perdone, images=new Array();
var txt=(NS4)?'<layer name="perouter" bgcolor="'+bordercolor+'" visibility="hide">' : '<div id="perouter" style="position:absolute; visibility:hidden; background-color:'+bordercolor+'">';
txt+='<table cellpadding="0" cellspacing="1" border="0"><tr><td width="'+barwidth+'" height="'+barheight+'" valign="center">';
if(NS4)txt+='<ilayer width="100%" height="100%"><layer width="100%" height="100%" bgcolor="'+unloadedcolor+'" top="0" left="0">';
txt+='<table cellpadding="0" cellspacing="0" border="0"><tr><td valign="center" width="'+barwidth+'" height="'+barheight+'" bgcolor="'+unloadedcolor+'"><center><font color="'+loadedcolor+'" size="1" face="sans-serif">Loading Images...</font></center></td></tr></table>';
if(NS4) txt+='</layer>';
txt+=(NS4)? '<layer name="perdone" width="100%" height="'+barheight+'" bgcolor="'+loadedcolor+'" top="0" left="0">' : '<div id="perdone" style="position:absolute; top:1px; left:1px; width:'+barwidth+'px; height:'+barheight+'px; background-color:'+loadedcolor+'; z-index:100">';
txt+='<table cellpadding="0" cellspacing="0" border="0"><tr><td valign="center" width="'+barwidth+'" height="'+barheight+'" bgcolor="'+loadedcolor+'"><center><font color="'+unloadedcolor+'" size="1" face="sans-serif">Loading Images...</font></center></td></tr></table>';
txt+=(NS4)? '</layer></ilayer>' : '</div>';
txt+='</td></tr></table>';
txt+=(NS4)?'</layer>' : '</div>';
document.write(txt);
function loadimages(){
if(NS4){
perouter=document.perouter;
perdone=document.perouter.document.layers[0].document.perdone;
}
if(NS6){
perouter=document.getElementById('perouter');
perdone=document.getElementById('perdone');
}
if(IE4){
perouter=document.all.perouter;
perdone=document.all.perdone;
}
cliplayer(perdone,0,0,barheight,0);
window.onresize=setouterpos;
setouterpos();
for(n=0;n<imagenames.length;n++){
images[n]=new Image();
images[n].src=imagenames[n];
setTimeout('checkload('+n+')' ,n*100);
}}
function setouterpos(){
var ww=(IE4)? document.body.clientWidth : window.innerWidth;
var x=(ww-barwidth)/2;
if(NS4){
perouter.moveTo(x,yposition);
perouter.visibility="show";
}
if(IE4||NS6){
perouter.style.left=x+'px';
perouter.style.top=yposition+'px';
perouter.style.visibility="visible";
}}
function dispbars(){
loaded++;
cliplayer(perdone, 0, blocksize*loaded, barheight, 0);
if(loaded>=imagenames.length)setTimeout('hideperouter()', 800);
}
function checkload(index){
(images[index].complete)? dispbars() : setTimeout('checkload('+index+')', 100);
}
function hideperouter(){
(NS4)? perouter.visibility="hide" : perouter.style.visibility="hidden";
imagesdone=true;
}
function cliplayer(layer, ct, cr, cb, cl){
if(NS4){
layer.clip.left=cl;
layer.clip.top=ct;
layer.clip.right=cr;
layer.clip.bottom=cb;
}
if(IE4||NS6)layer.style.clip='rect('+ct+' '+cr+' '+cb+' '+cl+')';
}
window.onload=loadimages;
__________________________________
plse tell me if this whole thing is unsane
Thank for your help
WS
Before you post, read our: 
