ciao ragazzi, conosco relativamente poco il javascript, in quanto faccio piu uso di php e Sql, spero che con la vostra sapienza su js mi risolvete questo enigma o direi proprio dogma!
ho uno script js che genera i pop up di immagini, il file è ipop.js , forse ne avrete gia sentito parlare.

cosa voglio:
Al click sull immagine mi si deve aprire il popup e avrei bisogno che fosse Ridimensionabile e che al posto dell url che nn vorrei fosse visto deve uscire "about:blank

testo questo script con Mozilla e firefox, mi basta che la compatibilità del sito sia verificata per questi 2.

>>Con Mozilla:
ok per l url che non viene mostrato in quanto appare "about:blank" ma la finestra non è ridimensionabile!

>>Con IE:
l'url viene mostrato e non va affatto bene! la finestra qui è ridimensionabile!

Allora com'è possibile che lo stesso script viene interpretato cosi diversamente dai 2 browser?

vi posto il docice sperando che sappiate dirmi come modificare in base alle mie esigenze:

///////////////// USER SETTINGS /////////////////
// Set the target for browsers that don't support the script. By default,
// target is "_self" which will open in the same window as the link. Change
// it to whatever target you like. The built in targets (_blank, _self,
// _top, and _parent) are supported.
iPop.DegradeTarget = "_blank";

// Set this to true if you want to be able to click on the image to close
// the popup window
iPop.ClickImageToClose = true;

// Set this to true if you want to close the last open popup image when you click
// on a new popup (like window reuse)
iPop.CloseOpenWindows = true;

// Messages displayed, you can customize them for your own language or wording
iPop.Messages = {
loading: "Caricamento immagine...",
loadingSub: "Un attimo di attesa...",

errorLoading: "Immagine non trovata.",
errorLoadingSub: "Impossibile caricare l'immagine.",
errorLoadingClose: "Chiudi la finestra",

noResize: "Immagine caricata.",
noResizeSub: "Il tuo browser non consente il ridimensionamento della finestra.",
noResizeView: "Visualizza l'immagine",

imageCloseTip: "Clicca per chiudere la finestra"
};

///////////////// FUNCTIONALITY /////////////////
///////////////// DO NOT EDIT /////////////////
iPop.Version = 2.7;
iPop.imgWin = null;
iPop.ieSp2 = (navigator.appName.toLowerCase().indexOf("internet explorer") > -1
&& navigator.appMinorVersion.toLowerCase().indexOf("s p2") > -1);

function iPop(img, imgTitle) {

function degrade() {
switch(iPop.DegradeTarget) {
case "_blank" : open(img); break;
case "_self" : location = img; break;
case "_top" : top.location = img; break;
case "_parent" : parent.location = img; break;
default : open(img, iPop.DegradeTarget);
}
return false;
}

// just follow the link in browsers that do not support images or the DOM
// or launch in specified target if that's what you wanted it to do
if(!document.images || !document.getElementById) { return degrade(); }

// check to close open popups (if set to do so)
if(iPop.CloseOpenWindows && iPop.imgWin) {
if(iPop.imgWin.close) { iPop.imgWin.close(); }
iPop.imgWin = null;
}

// initial (small) window with loading screen
var width = 150, height = 100;
if(iPop.ieSp2) { height += 20; }
var left = (screen.availWidth - width)/2, top = (screen.availHeight - height)/ 2;
var imgWin = window.open("about:blank", "", "width=" + width + ",height=" + height + ",left=" + left + ",top=" + top);
// when moz disables all popups, imgWin will be false
if(!imgWin) { return degrade(); }

// user can pass an image title if they wish. by default,
// window title will display: "Image (img source)"
imgTitle = imgTitle || "Image (" + img + ")";

// before the script is loaded, at least in Win/IE when doing local testing;
// timeout should (presumably) prevent that
var html = '<!--\niPop Script (http://stilleye.com/projects/dhtml/iPop/)'
+ '\niPop.Version = ' + iPop.Version + '\n-->'
+ '\n<html><head><title>Loading</title>'
+ '\n<script type="text/javascript">\nvar _e = null;'
+ '\nvar ip = window.opener.iPop;'
+ '\nvar _pageLoaded = false;'
+ '\nvar _title = "' + imgTitle + '"'
+ '\nonload = function(e) { _pageLoaded = true; }'
+ '\nfunction imgLoad(e) { ip.ImageLoaded(e, window); }'
+ '\nfunction imgError(e) { ip.ErrorLoading(e, window); }'
+ '\nimgShow = ip.ImageShow;'
+ '\nimgManualPopup = ip.ImageLoadedManualPopup;'
+ '\n</script>'
+ '\n<style type="text/css">'
+ '\nhtml, body { font : 12px Arial; margin : 0; overflow : hidden; } h1 { font-size : 1.5em; }'
+ '\n h2 { font-size : 1.2em; } a { color : blue; } img { visibility: hidden; border-color : black; }'
+ '\n .message { position : absolute; left : 0px; top : 0px; width : 150px; height : 100px; background : white; text-align : center; }'
+ '\n .message .main-message { font-weight : bold; display : block; }'
+ '\n .message .secondary-message { color : #999; font-size : 11px; }'
+ '\n .main-message.loading { margin-top : 35px; } .main-message.loaded { margin-top : 33px; } .main-message.error { margin-top : 25px; }'
+ '\n #loading { z-index : 50; } #resize { z-index : 30; } #error { z-index : 40; }'
+ '\n #image { position : absolute; left : 0px; top : 0px; width : 100%; height : 100%; z-index : 20; padding : 10px; background : white; }'
+ '\n</style>'
+ '\n</head>\n<body>'
+ '\n<div id="loading" class="message"><span class="main-message loading">'
+ iPop.Messages.loading
+ '</span> <span class="secondary-message">'
+ iPop.Messages.loadingSub
+ '</span></div>'
+ '\n<div id="error" class="message"><span class="main-message error">'
+ iPop.Messages.errorLoading
+ '</span> <span class="secondary-message">'
+ iPop.Messages.errorLoadingSub
+ '
<a href="javascript:window.close()">'
+ iPop.Messages.errorLoadingClose
+ '</a></span></div>'
+ '\n<div id="resize" class="message"><span class="main-message error">'
+ iPop.Messages.noResize
+ '</span> <span class="secondary-message">'
+ iPop.Messages.noResizeSub
+ '
<a href="javascript:imgManualPopup(_e, window)">'
+ iPop.Messages.noResizeView
+ '</a></span></div>'
+ '\n<div id="image">';
if(iPop.ClickImageToClose) {
html += '\n<a href="javascript:window.close()" title="'
+ iPop.Messages.imageCloseTip
+ '">';
}
html += '\n[img]' + img + '[/img]';
if(iPop.ClickImageToClose) { html += '</a>'; }
html += '\n</div>'
+ '\n</body></html>';

imgWin.document.open();
imgWin.document.write(html);
imgWin.document.close();

iPop.imgWin = imgWin;

return false;
}

iPop.ImageLoaded = function(e, win) {
if(!e || !win) { return; }
e.onload = null;
e.onerror = null;
if(win._pageLoaded) {
function show() {
win.imgShow(e, win);
}
win.setTimeout(show, 100);
} else {
function noShow() {
win.imgLoad(e, win);
}
win.setTimeout(noShow, 100);
}
}

iPop.ImageShow = function(e, win) {
if(!e || !win) { return; }
e.onload = null; e.onerror = null;

var doc = win.document;
var width = e.width + 40,
height = e.height + 65;
if(iPop.ieSp2 || (win.statusbar && win.statusbar.visible)) { height += 60; }

var tooLarge = false;

if(width > screen.availWidth) {
width = screen.availWidth - 20;
tooLarge = true;
}
if(height > screen.availHeight) {
height = screen.availHeight - 20;
tooLarge = true;
}
if(tooLarge) {
doc.getElementById("image").style.overflow = "auto";
}

var tooSmall = false;
if(e.width < doc.body.clientWidth && e.height < doc.body.clientHeight) {
tooSmall = true;
}

var left = (screen.availWidth - width)/2, top = (screen.availHeight - height)/ 2;
win.moveTo(left, top);
win.resizeTo(width, height);

var docElm = doc.documentElement || {};
var winWidth = docElm.clientWidth||doc.body.clientWidth||win.inne rWidth,
winHeight = docElm.clientHeight||doc.body.clientHeight||win.in nnerHeight;
if( (tooLarge && (winWidth < 200 || winHeight < 200) )
|| !tooLarge && !tooSmall && (e.width > 150 && winWidth <= 150 || e.height > 100 && winHeight <= 100) ) {
win._e = {
src : e.src,
width : e.width,
height : e.height,
tooLarge : tooLarge
}
doc.getElementById("loading").style.display = "none";
doc.getElementById("error").style.display = "none";
doc.getElementById("image").style.display = "none";
doc.title = "Image Loaded";
} else { // can resize
doc.getElementById("loading").style.display = "none";
doc.getElementById("error").style.display = "none";
doc.getElementById("resize").style.display = "none";
doc.getElementById("theImg").style.visibility = "visible";
doc.title = win._title;
}
}

iPop.ErrorLoading = function(e, win) {
if(!e || !win) { return; }
var doc = win.document;
e.onload = null; e.onerror = null;

doc.getElementById("loading").style.display = "none";
doc.getElementById("resize").style.display = "none";
doc.getElementById("image").style.display = "none";
doc.title = "Image not found";
}

iPop.ImageLoadedManualPopup = function(e, win) {
if(!e || !win) { return; }
var width = e.width + 20, height = e.height + 20;
if(width > screen.availWidth) { width = screen.availWidth - 20; }
if(height > screen.availHeight) { height = screen.availHeight - 100; }
var left = (screen.availWidth - width)/2, top = (screen.availHeight - height)/ 2;
win.open(e.src, "ManualImageViewer", "width=" + width + ",height=" + height + ",left=" + left + ",top=" + top + (e.tooLarge ? ",scrollbars=0,resizable=1" : ""));
win.close();
}
///////////////// EXTENSIONS /////////////////

iPop.AutoApply = function(container) {
if(!container) { container = document; }
var a = container.getElementsByTagName("A");
for(var i = 0; i < a.length; i++) {
if( a[i].href.match(/\.(gif|jpg|jpeg|png|bmp)$/i) ) {
applyPopup(a[i]);
}
}

function applyPopup(link) {
// check to see if link holds *just* a thumbnail and get
// the thumbnail's alternate text for image popup title
var n, imgs = 0, whitespace = 0, alt = null;
for(var i = 0; n = link.childNodes[i]; i++) {
if(n.tagName == "IMG") {
imgs++;
alt = n.alt;
} else if(n.nodeValue) {
var val = n.nodeValue;
if(val.replace(/\s+/g, "") == "") { whitespace++; }
}
}
n = null;
if(!alt) { alt = link.title; }

// apply iPop to link
link.onclick = function(e) { return iPop(this.href, alt); }
}
}