function vIE(){return (navigator.appName=='Microsoft Internet Explorer')?parseFloat((new RegExp("MSIE ([0-9]{1,}[.0-9]{0,})")).exec(navigator.userAgent)[1]):-1;}

function rollup(panel) {
	$('#'+panel).slideUp("normal");
	$('#rollup_'+panel)[0].style.backgroundPosition = '0 0';
	$('#rollup_'+panel +' > a').attr('href','javascript:rolldown("'+panel+'");');	
}

function rolldown(panel,icon) {
	$('#'+panel).slideDown("normal");
	$('#rollup_'+panel)[0].style.backgroundPosition = '0 -50px';
	$('#rollup_'+panel +' > a').attr('href','javascript:rollup("'+panel+'");');
}