<!-- // Hide script contents from old browsers.

function gup(name)
{
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var tmpURL = window.location.href;
  var results = regex.exec(tmpURL);
  if( results == null )
    return "";
  else
    return results[1];
}
	
	
function rsvpEmail() {

var callid = gup('callid');
var email = document.post.body.value;

document.post.return_url.value = 'http://www.healthandenvironment.org/rsvp_confirm?callid=' + callid + '&e=' + email;


		var problem = 'No';
		var alertMessage = 'Some required fields are empty: \n';		

		if (document.post.title.value.length <= 0) {
			alertMessage = alertMessage + "Please enter a first name. \n";
		}

		if (document.post.summary.value.length <= 0) {
			alertMessage = alertMessage + "Please enter a last name. \n";
		}


		var reg = /^[-_a-z0-9]+(\.[-_a-z0-9]+)*@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]{2,6}$/i; 

		if (!reg.test(document.post.body.value)) {
			alertMessage = alertMessage + "Please enter a valid email address. \n";
		}

		if ((document.post.title.value.length <= 0) || (document.post.summary.value.length <= 0) || !reg.test(document.post.body.value)) {
			problem = 'Yes';
			alert (alertMessage);
		}


		if (problem == 'No') {
			return true;
		} else { 
			return false; 
		}
	}

	//-->