// Validering af tip-en-ven

function tipEval(thisform) {
// Startværdier
strError = 'Der mangler et par ting i formularen:\n\n';
intError = 0;


// Check navne
if (thisform.YourName.value == "")
{
strError = strError + 'Du glemte at angive et navn.\n'
intError = 1;
thisform.YourName.focus(); 
}
if (thisform.FriendsName.value == "")
{
strError = strError + 'Du glemte at angive modtagerens navn.\n'
intError = 1;
thisform.FriendsName.focus(); 
}

// Check for @ i email
if (thisform.YourEmail.value.indexOf("@") == -1 && thisform.YourEmail.value != "")
{
strError = strError + 'Du glemte et "@" i e-mailadressen\n'
intError = 1;
thisform.YourEmail.focus(); 
} 

// Check for . i email
if (thisform.YourEmail.value.indexOf(".") == -1 && thisform.YourEmail.value != "")
{
strError = strError + 'Du glemte et "." i e-mailadressen\n'
intError = 1;
thisform.YourEmail.focus(); 
} 

// Check for ingen email
if (thisform.YourEmail.value == "")
{
strError = strError + 'Du glemte at skrive din e-mailadresse\n'
intError = 1;
thisform.YourEmail.focus(); 
} 

// Check for @ i email
if (thisform.FriendsEmail.value.indexOf("@") == -1 && thisform.FriendsEmail.value != "")
{
strError = strError + 'Du glemte et "@" i modtagerens e-mailadresse\n'
intError = 1;
thisform.FriendsEmail.focus(); 
} 

// Check for . i email
if (thisform.FriendsEmail.value.indexOf(".") == -1 && thisform.FriendsEmail.value != "")
{
strError = strError + 'Du glemte et "." i modtagerens e-mailadresse\n'
intError = 1;
thisform.FriendsEmail.focus(); 
} 

// Check for ingen email
if (thisform.FriendsEmail.value == "")
{
strError = strError + 'Du glemte at skrive modtagerens e-mailadresse\n'
intError = 1;
thisform.FriendsEmail.focus(); 
} 

strError = strError + '\n'
strError = strError + 'Tak skal du have.\n'
if (intError == 1) {
alert(strError)
return false;
}
}