/* popup function */
var newwindow = ''

function popitup( url ) {
	if ( newwindow.location && !newwindow.closed ) {
		newwindow.location.href = url; 
		newwindow.focus();
	} else { 
		newwindow=window.open( url,'mainImage','width=550,height=660,resizable=1' );
	} 
}