//--------------------------------------------------------------------//
// スクリプト定義
//--------------------------------------------------------------------//

// ページトップへ
function backToTop() {
	var x1 = x2 = x3 = 0;
	var y1 = y2 = y3 = 0;

	if (document.documentElement) {
		x1 = document.documentElement.scrollLeft || 0;
		y1 = document.documentElement.scrollTop || 0;
	}

	if (document.body) {
		x2 = document.body.scrollLeft || 0;
		y2 = document.body.scrollTop || 0;
	}

	x3 = window.scrollX || 0;
	y3 = window.scrollY || 0;

	var x = Math.max(x1, Math.max(x2, x3));
	var y = Math.max(y1, Math.max(y2, y3));

	window.scrollTo(Math.floor(x*3/ 5), Math.floor(y*3 / 5));

	if (x > 0 || y > 0) {
		window.setTimeout("backToTop()", 25);
	}
}

// 外部リンクを別窓へ
function externalLinks() {
	if ( !document.getElementsByTagName )	return;

	var anchors = document.getElementsByTagName("a");

	for ( var i=0; i<anchors.length; i++ ) {
		var anchor = anchors[i];
		if (( anchor.getAttribute("href") )
		  &&( anchor.getAttribute("rel") == "external")
		) {
			anchor.target = "_blank";
		}
	}
}
window.onload=externalLinks;