function verification(){
var emailpat=/@/;
var pass=true;
if (document.demoinfo.firstname.value == 0){
alert("You must enter a first name");
document.demoinfo.firstname.focus();
var pass=false;
}
else if (document.demoinfo.lastname.value == 0){
alert("You must enter a last name");
document.demoinfo.lastname.focus();
var pass=false;
}
else if (document.demoinfo.companyname.value == 0){
alert("You must enter a company");
document.demoinfo.companyname.focus();
var pass=false;
}
else if (document.demoinfo.telephone.value == 0){
alert("You must enter a telephone number.");
document.demoinfo.telephone.focus();
var pass=false;
}
else if (document.demoinfo.email.value == 0){
alert("You must enter an email address");
document.demoinfo.email.focus();
var pass=false;
}

//this uses a regular expression to determine if the @ is in the e-mail address
else if (document.demoinfo.email.value.match(emailpat)==null){
alert("you must enter a valid e-mail address");
document.demoinfo.email.focus();
var pass=false;
}
return pass
return pass
}