function popup ( _this ) {

	window.open( 'popup.php?image=' + _this.id , 'popup' , 'height=562,width=624' ) ;

}

function show ( _this ) {

	document.getElementById( 'span_' + _this.id ).style.display = 'block' ;

}

function hide ( _this ) {
	
	document.getElementById( 'span_' + _this.id ).style.display = 'none' ;
}