function MAIN_Content_View(on) {
		for (var i=1; i<=3; i++) {
		var obj_file = document.all["main_zone" + i];
		var obj_img = 	document["main_img" + i];
			if (i == on) {
				obj_file.style.display = "block";
				obj_img.src = "img09/menu_0"+ i +"_on.jpg";
			} else {
				obj_file.style.display = "none";
				obj_img.src = "img09/menu_0"+ i +"_off.jpg";
			}
		}
	}
	

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.attachEvent('onload',externalLinks);