function openWin(imageName,imageWidth,imageHeight,posLeft,posTop) {
var alt = 'Click to close this window';
newWindow = window.open("","newWindow","width="+imageWidth+",height="+imageHeight+",resizable=no,scrollbars=no,left="+posLeft+",top="+posTop);
newWindow.document.open();
newWindow.document.write(''+alt+'');
newWindow.document.write('![\"'+alt+'\"](\"'+imageName+'\")
');
newWindow.document.write('');
newWindow.document.close();
newWindow.focus();
}