var cur_index = 0;

function switch_layer(idx)
{
	var lay = eval("document.all['layer" + idx + "']");
	var cur_lay = eval("document.all['layer" + cur_index + "']");

	cur_lay.style.display = "none";
	lay.style.display = "block";
	cur_index = idx;
}

var dur_index = 4;

function switching_layer(idx)
{
	var lay = eval("document.all['layer" + idx + "']");
	var dur_lay = eval("document.all['layer" + dur_index + "']");

	dur_lay.style.display = "none";
	lay.style.display = "block";
	dur_index = idx;
}


//À̹ÌÁö Å׵θ®
function bluring(){
if(event.srcElement.tagName=="A"||event.srcElement.tagName=="IMG") document.body.focus();
}
document.onfocusin=bluring;