window.addEvent('domready', externalLinks);

function externalLinks() { 
	if(!document.getElementsByTagName) {return;} 
	var anchors = document.getElementsByTagName("a");
	var c=anchors.length;
	for(var i=0; i<c; i++) { 
		var anchor=anchors[i]; 
		if(anchor.getAttribute("href") && anchor.getAttribute("rel")=="external") {
			anchor.target='w_'+parseInt(Math.random()*1000000);
		}
	}
}