// JavaScript Document

function isEmpty(strName, strEmail, strComments) {

strName = document.forms[0].Name.value
strEmail = document.forms[0].Email.value
strComments = document.forms[0].Comments.value

    if (strName == "" || strName == null || strName.charAt(0) == ' ')
    {
    alert("Please add your name")
    return false;
    }
	if(strEmail != ""){
	var atSymbol = 0
	for(var a = 0; a < strEmail.length; a++){
	if(strEmail.charAt(a) == "@"){
	atSymbol++
	}
	}
	if(atSymbol > 1){
	alert("Please enter a valid email address")
	return false
	}
	if(atSymbol == 1 && strEmail.charAt(0) != "@"){
	var period = strEmail.indexOf(".",strEmail.indexOf("@")+2)
	var twoPeriods = (strEmail.charAt((period+1)) == ".") ? true : false
	if(period == -1 || twoPeriods || strEmail.length < period + 2 || strEmail.charAt(strEmail.length-1)=="."){
	alert("Please enter a valid email address")
	return false
	}
	}
	else{
	alert("Please enter a valid email address")
	return false
	}
	}
	else{
	alert("Please enter a valid email address")
	return false
	}
	if (strComments == "" || strComments == null || strComments.charAt(0) == ' ')
    {
    alert("Please add your message.")
    return false;
    }
    return true;
}

function check(form){
if (isEmpty(form.Name)){
	if (isEmpty(form.Email)){
	if (isEmpty(form.Comments)){
		  return true;
			   }
  }
}
return false;
}