function domainCheck() {
	if(document.getElementsByTagName) {
		var anchors = document.getElementsByTagName("a");

		for(var i=0; i < anchors.length; i++) {
			if(anchors[i].getAttribute("href") != null) {
				if( anchors[i].getAttribute("href").match(/^http:\/\/www\.city.kaizuka\.lg\.jp\//) || anchors[i].getAttribute("href").match(/^http:\/\/www2\.city.kaizuka\.osaka\.jp/) || anchors[i].getAttribute("href").match(/^http:\/\/www\.city.kaizuka\.osaka\.jp/) ) {
					anchors[i].setAttribute("target", "_self");
				}
			}
		}
	}
}
if(window.addEventListener) {
	window.addEventListener("load", domainCheck, false);
}
else if(window.attachEvent) {
	window.attachEvent("onload", domainCheck);
}