function overContent(id) {
	document.getElementById('content').innerHTML=document.getElementById('content'+id).innerHTML;
}
function outContent() {
	document.getElementById('content').innerHTML=document.getElementById('content'+document.getElementById('currentContent').value).innerHTML;
}
function clickContent(id) {
	document.getElementById('currentContent').value=id;
	document.getElementById('content').innerHTML=document.getElementById('content'+id).innerHTML;
}