var is_show = false;
var is_show2 = false;
function openmenu(menu, on){

	if(menu == "about"){
		
		if(!is_show){
			document.getElementById("about").style.display = 'block';
			document.getElementById("about_mouse").style.backgroundColor = '#c1141b'; 
			is_show = true;
		}else{
			document.getElementById("about").style.display = 'none';
			is_show = false;
		}
	}
	else if(menu == "p_study"){
		if(!is_show2){
			document.getElementById("p_study").style.display = 'block';
			document.getElementById("p_study_mouse").style.backgroundColor = '#c1141b'; 
			is_show2 = true;
		}else{
			document.getElementById("p_study").style.display = 'none';
			is_show2 = false;
		}	
	}
}

function mouseOver(menu)
{
	document.getElementById(menu).style.backgroundColor = '#c1141b';
}

function mouseOut(menu)
{
	document.getElementById(menu).style.backgroundColor = "";
}