Listo, prueba asi
Código HTML:
Ver original<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> PositionX = 100;
PositionY = 100;
defaultWidth = 500;
defaultHeight = 500;
var AutoClose = true;
if (parseInt(navigator.appVersion.charAt(0))>=4){
var isNN=(navigator.appName=="Netscape")?1:0;
var isIE=(navigator.appName.indexOf("Microsoft")!=-1)?1:0;}
var optNN='scrollbars=no,width=512,height=368,left='+PositionX+',top='+PositionY;
var optIE='scrollbars=no,width=515,height=370,left='+PositionX+',top='+PositionY;
function popImage(imageURL,imageTitle){
if (isNN){imgWin=window.open('about:blank','',optNN); }
if (isIE){imgWin=window.open('about:blank','',optIE); }
with (imgWin.document){
writeln('<sc'+'ript>');
writeln('var isNN,isIE;');
writeln('if (parseInt(navigator.appVersion.charAt(0))>=4){');
writeln('isNN=(navigator.appName=="Netscape")?1:0; ');
writeln('isIE=(navigator.appName.indexOf("Micro soft")!=-1)?1:0;}');
writeln('function reSizeToImage(){');
writeln('if (isIE){');writeln('window.resizeTo(100,100);');
writeln('width=520;');
writeln('height=425;');
writeln('window.resizeTo(width,height);}');
writeln ('if (isNN){');
writeln('window.innerWidth=document.images["imagenes"].width;');
writeln('window.innerHeight=document.images["imagenes"].height;}}');
writeln('function doTitle(){document.title="'+imageTitle+'";}');
writeln('</sc'+'ript>');
if (!AutoClose) writeln('
</head><body bgcolor=000000 scroll="no" onload="reSizeToImage();doTitle();self.focus()">')
else writeln('
</head><body bgcolor=ffffff scroll="no" onload="reSizeToImage();doTitle();self.focus()" onblur="self.close()">');
writeln('
<img name="imagenes" src='+imageURL+' style="display:block"></body></html>');
close();
}}
function popImage2(imageURL,imageTitle){
if (isNN){imgWin=window.open('about:blank','',optNN); }
if (isIE){imgWin=window.open('about:blank','',optIE); }
with (imgWin.document){
writeln('<sc'+'ript>');
writeln('var isNN,isIE;');
writeln('if (parseInt(navigator.appVersion.charAt(0))>=4){');
writeln('isNN=(navigator.appName=="Netscape")?1:0; ');
writeln('isIE=(navigator.appName.indexOf("Micro soft")!=-1)?1:0;}');
writeln('function reSizeToImage(){');
writeln('if (isIE){');writeln('window.resizeTo(100,100);');
writeln('width=515;');
writeln('height=632;');
writeln('window.resizeTo(width,height);}');
writeln ('if (isNN){');
writeln('window.innerWidth=document.images["imagenes"].width;');
writeln('window.innerHeight=document.images["imagenes"].height;}}');
writeln('function doTitle(){document.title="'+imageTitle+'";}');
writeln('</sc'+'ript>');
if (!AutoClose) writeln('
</head><body bgcolor=000000 scroll="no" onload="reSizeToImage();doTitle();self.focus()">')
else writeln('
</head><body bgcolor=ffffff scroll="no" onload="reSizeToImage();doTitle();self.focus()" onblur="self.close()">');
writeln('
<img name="imagenes" src='+imageURL+' style="display:block"></body></html>');
close();
}}
<table width="100%" border="0" cellpadding="0"> <td height="33" colspan="2" bgcolor="#0061AF"> <div align="center"><font color="#FFB678" size="5"><strong><em>Cartel
</em></strong></font></div></td> <td colspan="2"> </td> <td width="50%" height="25" class="letra"><div align="center"><a href="javascript:popImage2('../img/cartela4.jpg','Mapa')"><img src="http://www.forosdelweb.com/f13/img/cartela4.jpg" alt="Haz click para abrir ventana desde imagen" width="238" height="334" border="0"></a> <td width="50 %" class="letra" align="center"><img src="http://www.forosdelweb.com/f13/img/nuevocartel.jpg" width="238" height="334"></td>