//code enters here
addEvent(window, 'load', linkPreview);

function addEvent(obj, evType, fn){ 
	if (obj.addEventListener){ 
		obj.addEventListener(evType, fn, false); 
		return true; 
	} 
	else if (obj.attachEvent){ 
		var r = obj.attachEvent("on"+evType, fn); 
		return r; 
	}
	else { 
		return false; 
	} 
}

function linkPreview(){
	var content = document.getElementById("content");
	var links = content.getElementsByTagName("a");
	var b = document.domain;

	for (i=0; i<links.length; i++){
		var currentLink = links[i];
		var	images = currentLink.getElementsByTagName("img");
		
		if (images.length == 0){
			var linkHref = currentLink.href;
			if(((b != '' && currentLink.href.indexOf(b) < 0) || b == '') && currentLink.href.indexOf('://') > 0) {
				append(currentLink, "externalLink");
				
			}
		}
	}
}

function append(currentLink, extension){
	currentLink.className = extension;	
	currentLink.setAttribute('target', '_blank');
}