function popup(windowURL) {
    windowName = window.open(windowURL,'popup','menubar=no,scrollbars=yes,resizable=yes,status=yes,width=490,height=515');
    if (windowName.opener == null) windowName.opener = self;
    windowName.focus();
}

function popsample(windowURL) {
    windowName = window.open(windowURL,'popup','menubar=no,scrollbars=yes,resizable=yes,status=yes,width=620,height=515');
    if (windowName.opener == null) windowName.opener = self;
    windowName.focus();
}



$(document).ready(function(){
	//hide the all of the element with class msg_body
	$(".sm_photo").mouseover(function() {
    		$(this).next(".lg_photo").addClass('on');
	});

	$(".lg_photo").mouseout(function() {
    		$(this).removeClass('on');
	});


});