function OpenImageViewer(SiteRoot, ImgURL, Title, WinWidth, WinHeight) {
	window.open(SiteRoot + 'Dialogs/ImageViewer.aspx?ImgURL=' + urlEncode(ImgURL) + '&Title=' + urlEncode(Title) + '&GUID=' + (parseInt(Math.random()*10000000000000000).toString()+parseInt(Math.random()*10000000000000000).toString()),'ImageViewer','width=' + WinWidth + ',height=' + WinHeight + ',left=' + ((screen.availWidth-WinWidth)/2) + ',top=' + ((screen.availHeight-WinHeight)/2) + ',menu=no,status=no');
}