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";
		}
	}
}

Event.observe(window,'load', externalLinks, false);

// メニュータブ処理
// <![CDATA[

var tab = {
	init: function(){
		var tabs = this.setup.tabs;
		var pages = this.setup.pages;
		
		for(i=0; i<pages.length; i++) {
			if(i !== 0) pages[i].style.display = 'none';
			tabs[i].onclick = function(){ tab.showpage(this); return false; };
		}
	},
	
	showpage: function(obj){
		var tabs = this.setup.tabs;
		var pages = this.setup.pages;
		var num;
		
		for(num=0; num<tabs.length; num++) {
			if(tabs[num] === obj) break;
		}
		
		for(var i=0; i<pages.length; i++) {
			if(i == num) {
				pages[num].style.display = 'block';
				tabs[num].className = 'present';
			}
			else{
				pages[i].style.display = 'none';
				tabs[i].className = null;
			}
		}
	}
}

// ]]>