function validateForm()
{
    var host=document.forms["form"]["host"].value
    var username=document.forms["form"]["username"].value
    var password=document.forms["form"]["password"].value
    var prefix=document.forms["form"]["prefix"].value
    var email=document.forms["form"]["email"].value
    var atpos=email.indexOf("@");
    var dotpos=email.lastIndexOf(".");

    if (host==null || host=="" || host=="Host Name")
        {
        alert("Host name must be filled out");
        return false;
        }
    if (username==null || username=="" || username=="Username")
        {
        alert("Username must be filled out");
        return false;
        }
    if (password==null || password=="" || password=="Password" || password=="Re-enter Password")
        {
        alert("Password must be filled out");
        return false;
        }
    if (email==null || email=="" || email=="Email" || email=="Re-enter Email")
        {
        alert("Email must be filled out");
        return false;
        }
    if (prefix==null || prefix=="" || prefix=="Prefix")
        {
        alert("Table prefix name must be filled out");
        return false;
        }
    if (atpos<1 || dotpos<atpos+2 || dotpos+2>=email.length)
        {
        alert("Not a valid e-mail address");
        return false;
        }
}