function showImage(imageName, imageWidth, imageHeight, alt, posLeft, posTop) {
newWindow = window.open("", "", "width="+imageWidth+", height="+imageHeight+", left="+posLeft+", top="+posTop);
newWindow.document.open();
newWindow.document.write(''+alt+'');
newWindow.document.write('
');
newWindow.document.write('');
newWindow.document.close();
newWindow.focus();
}