function validateVolunteer(fname, lname, phone, email){
	if (fname.value =="" || fname.value == null){
		alert("Please enter your first name.");
		return false;
	}
	else if (lname.value =="" || lname.value == null){
		alert("Please enter your last name.");
		return false;
	}
	else if (phone.value =="" || phone.value == null){
		alert("Please enter your phone number.");
		return false;
	} 
	else if (email.value =="" || email.value == null){
		alert("Please enter your email address.");
		return false;
	}
	else if (!echeck(email.value)){
		alert("Please enter a valid email address.");
		return false;
	}
	else{
		return true;
	}
}

function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    return false
		 }

 		 return true					
	}