function showthemeimage() {
	if (!document.images) return; 
 	document.images.preview.src='themes/'+document.themeform.newtheme.options[document.themeform.newtheme.selectedIndex].value+'/images/preview.png';
 	document.images.preview.alt=document.themeform.newtheme.options[document.themeform.newtheme.selectedIndex].value;
 	document.images.preview.title=document.themeform.newtheme.options[document.themeform.newtheme.selectedIndex].value;
}