function resizeImg()
{
// ========================================
// Customise these 2 variables as you wish.
// ========================================

var _resizeWidth = 400;
var ResizeMsg = 'This image is reduced, click to view original size!';

// ======================================
// No need to change anything below here.
// ======================================

var _resizeClass = 'imgcode';
var div = document.getElementById("mx");
var imgArray = document.getElementsByTagName('img');

for(var i = 0; i < imgArray.length; i++)
{
var imgObj = imgArray[i];

if(imgObj.parentNode.id == 'messageseps')continue;

if(imgObj.className == _resizeClass && imgObj.width > _resizeWidth)
{
imgObj.style.width = _resizeWidth + 'px';
imgObj.onclick = ImagecodeWinOpen;
imgObj.title = ResizeMsg;
}
}
}

function ImagecodeWinOpen(e) {

var img = (e)?e.target.src:window.event.srcElement.src;

var w = window.open('','IMG','titlebar,scrollbars,resizable');
if (w) {
w.document.write('<div align="center"><img src="'+img+'"><br /><a href="#" onClick="window.close(); return false">Close</a></div>')
w.document.close();
}
else alert('Please enable popups')
}
window.onload = resizeImg;