// JavaScript Document
function exchStatus(target_div){
	if (target_div != ''){
		contentDiv = document.getElementById(target_div);
		if (contentDiv.style.display == 'none'){
			contentDiv.style.display = '';
		}
		else{
			contentDiv.style.display = 'none';
		}
	}
}
function exchHeight(target_div){
	if (target_div != ''){
		contentDiv = document.getElementById(target_div);
			contentDiv.style.height = '';
	}
}

function changeSize(ss){
	contentDiv = document.getElementById('mainText');
		contentDiv.style.fontSize = ss+'px';
}