var NewWindow=null;
function ShowImage(ImgSource,ImgWidth,ImgHeight,ImgAlt) {
var WinLeft=Math.floor((screen.width-ImgWidth-100)/2);
var WinTop=Math.floor((screen.height-ImgHeight-100)/2);
window.status='Click Here';
if (NewWindow!=null && !NewWindow.closed) {
NewWindow.close();
}
var WinAppearence = 'scrollbars=no,width='+(ImgWidth+100)+',height='+(ImgHeight+100)+',top='+WinTop+',left='+WinLeft;
var Hypertext = '';
NewWindow=window.open( '','NewWindow',WinAppearence);
NewWindow.document.writeln(Hypertext);
NewWindow.focus();
}