function handleExternalLinks() { // function makes sure that external links open in new window
	var hostName = window.location.hostname;
	var links = document.getElementsByTagName("a");
	for(var i = 0; i < links.length; i++) {
		if(links[i].href.indexOf(hostName) == -1) {
			var curTitle = (links[i].getAttribute("title")) ? links[i].getAttribute("title") + " - ": "";
			links[i].setAttribute("target", "_blank");
			links[i].setAttribute("title",  curTitle + "opens in new window");
		}
	}
}

handleExternalLinks(); // Call the function

<form name="ctl00" method="post" action="Contact.aspx" onsubmit="javascript:return WebForm_OnSubmit();" id="ctl00">
<div>
<input type="hidden" name="__EVENTTARGET" id="__EVENTTARGET" value="" />
<input type="hidden" name="__EVENTARGUMENT" id="__EVENTARGUMENT" value="" />
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwUKMTc2Njk0OTgwMA9kFgRmD2QWAgIBDxYCHglpbm5lcmh0bWwFF0NhbXAgRGF2aWQgLSBDb250YWN0IFVzZAIBD2QWBGYPFgIfAAUXQ2FtcCBEYXZpZCAtIENvbnRhY3QgVXNkAgEPFgIfAAUcUGxlYXNlIFNlbmQgVXMgWW91ciBGZWVkYmFja2QYAQUeX19Db250cm9sc1JlcXVpcmVQb3N0QmFja0tleV9fFgMFB3JiQ29hY2gFC3JiV2VibWFzdGVyBQtyYldlYm1hc3RlcuO+wn5wpHxAvrJjEHMZ6ZaaIFHV" />
</div>

<script type="text/javascript">
//<![CDATA[
var theForm = document.forms['ctl00'];
if (!theForm) {
    theForm = document.ctl00;
}
function __doPostBack(eventTarget, eventArgument) {
    if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
        theForm.__EVENTTARGET.value = eventTarget;
        theForm.__EVENTARGUMENT.value = eventArgument;
        theForm.submit();
    }
}
//]]>
</script>


<script src="/WebResource.axd?d=x0XU1Ey2qq0hxM_s6WVVIQ2&amp;t=633363148378379010" type="text/javascript"></script>


<script src="/WebResource.axd?d=nKMyKWTcpRyEA_g_zZOabkHpLzfVqjZ8X2U5kT--LKo1&amp;t=633363148378379010" type="text/javascript"></script>
<script type="text/javascript">
//<![CDATA[
function WebForm_OnSubmit() {
if (typeof(ValidatorOnSubmit) == "function" && ValidatorOnSubmit() == false) return false;
return true;
}
//]]>
</script>