function checkit(){

var email_p = /^(.+\@.+\..+)$/;

if (document.trialenroll.email.value == "") {
	alert('You must fill in all fields before submitting, including your email address.');
	document.trialenroll.email.focus();
	return false;
}
if (!email_p.test(document.trialenroll.email.value)) {
	alert('Please reenter a valid email address.');
	document.trialenroll.email.focus();
	return false;
}

if (((document.trialenroll.title[0].checked) || (document.trialenroll.title[1].checked) || (document.trialenroll.title[2].checked) || (document.trialenroll.title[3].checked))!=true){
					alert("Please indicate your preferred title \(\"Ms.\", \"Mrs.\", etc.\) before submitting.");
					return false;
}

for (var x=0; x<eval('document.trialenroll.elements.length');x++){
if (eval('document.trialenroll.elements[x].type=="text"')){
				if (eval(document.trialenroll.elements[x].value=="")){
					alert("You must fill in all text fields before submitting.");
					return false;
				}
			}

if (eval('document.trialenroll.elements[x].type=="textarea"')){
				if (eval(document.trialenroll.elements[x].value=="")){
					alert("You must fill in all fields before submitting.");
					return false;
				}
			} 
	}
}