var erstring="Please input the required fields:";

function isEmptyField(field)
{
	var fieldValue=document.getElementById(field).value;
	if (fieldValue==""||fieldValue==null||!isNaN(fieldValue))
    {
		return false;
    }
	return true;
}

function isValidEmailField(emailfield){
 	emailValue=document.getElementById(emailfield).value;
	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(emailValue)){
		return (true)
	}
	return false
}
function checkform(firstname,lastname,title, company,email){
	/*if (isEmptyField(firstname) && isEmptyField(lastname) && isEmptyField(company) && isValidEmailField(email) && isEmptyField(question)){
			return true;
	}	*/
	if(!isEmptyField(firstname)) erstring += "\n - First Name";
	if(!isEmptyField(lastname)) erstring += "\n - Last Name";
	if(!isEmptyField(title)) erstring += "\n - Title";
	if(!isEmptyField(company)) erstring += "\n - Company";
	if(!isValidEmailField(email)) erstring += "\n - Email";
	if(erstring=="Please input the required fields:")
	{
		return true
	}
	else
	{
		alert(erstring);
		erstring="Please input the required fields:";
		return false;
	}
}