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.onload = externalLinks;

// makeRequest
// http://www.captain.at/howto-ajax-form-post-get.php
var http_request = false;
function makeRequest(url, parameters) {
	http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			// set type accordingly to anticipated content type
			//http_request.overrideMimeType('text/xml');
			http_request.overrideMimeType('text/html');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_request) {
		alert('Cannot create XMLHTTP instance');
		return false;
	}
	http_request.onreadystatechange = alertContents;
	http_request.open('GET', url + parameters, true);
	http_request.send(null);
}

function alertContents() {
	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			//alert(http_request.responseText);
			result = http_request.responseText;
			document.getElementById('msg').innerHTML = result;            
		} else {
			alert('There was a problem with the request.');
		}
	}
}
   
function get(obj) {
	var getstr = "?";
	for (i=0; i<obj.getElementsByTagName("input").length; i++) {
		if (obj.getElementsByTagName("input")[i].type == "text") {
			getstr += obj.getElementsByTagName("input")[i].name + "=" + obj.getElementsByTagName("input")[i].value + "&";
		}
		if (obj.getElementsByTagName("input")[i].type == "checkbox") {
			if (obj.getElementsByTagName("input")[i].checked) {
				getstr += obj.getElementsByTagName("input")[i].name + "=" + obj.getElementsByTagName("input")[i].value + "&";
			} else {
				getstr += obj.getElementsByTagName("input")[i].name + "=&";
			}
		}
		if (obj.getElementsByTagName("input")[i].type == "radio") {
			if (obj.getElementsByTagName("input")[i].checked) {
				getstr += obj.getElementsByTagName("input")[i].name + "=" + obj.getElementsByTagName("input")[i].value + "&";
			}
		}  
		if (obj.getElementsByTagName("input")[i].tagName == "SELECT") {
			var sel = obj.getElementsByTagName("input")[i];
			getstr += sel.name + "=" + sel.options[sel.selectedIndex].value + "&";
		}
	}
	for (i=0; i<obj.getElementsByTagName("textarea").length; i++) {
		getstr += obj.getElementsByTagName("textarea")[i].name + "=" + obj.getElementsByTagName("textarea")[i].value + "&";
	}
	makeRequest('sendform.php', getstr);
}