// Email Validation. Written by PerlScriptsJavaScripts.com

function check_email(e) {
ok = "1234567890qwertyuiop[]asdfghjklzxcvbnm.@-_QWERTYUIOPASDFGHJKLZXCVBNM";
for(i=0; i < e.length ;i++){
if(ok.indexOf(e.charAt(i))<0){ 
return (false);
}	
} 

if (document.images) {
re = /(@.*@)|(\.\.)|(^\.)|(^@)|(@$)|(\.$)|(@\.)/;
re_two = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
if (!e.match(re) && e.match(re_two)) {
return (-1);		
} 
}
}


function check_number(e) {
if(e.length < 8){
return (false);
}else{
return (true);
}
}


function check_form(f) { // f is the form (passed using the this keyword)

if(!check_number(f.login.value)){

alert("Nummer niet okay");
f.login.focus(); 
f.submit.disabled=false;
// if the browser is Netscape 6 or IE
if(document.all || document.getElementByID){
// change the color of text field
f.login.style.background = "yellow";
}
// make sure the form is not submitted
return false;
}

if(!check_email(f.email.value)){
alert("Email niet okay");
f.email.focus(); 
f.submit.disabled=false;
// if the browser is Netscape 6 or IE
if(document.all || document.getElementByID){
// change the color of text field
f.email.style.background = "yellow";
}
// make sure the form is not submitted
return false;
}

}