function insertspecial(tag) {
var space=" ";
var text=prompt("Type text you wish to enter:","");
if (text != null)
        {
        var text_to_insert = space+'['+tag+']'+text+'[/'+tag+']'+space;
        insertAtCursor(document.form.message, text_to_insert);
        }
document.form.message.focus();
}

function insertAtCursor(myField, myValue) {
if (document.selection) {
myField.focus();
sel = document.selection.createRange();
sel.text = myValue;
}
else if (myField.selectionStart || myField.selectionStart == '0') {
var startPos = myField.selectionStart;
var endPos = myField.selectionEnd;
myField.value = myField.value.substring(0, startPos)
+ myValue
+ myField.value.substring(endPos, myField.value.length);
} else {
myField.value += myValue;
}
}

function mboard_checkFields() {
d=document.form;
if (d.username.value=='') {alert('Please enter your name!'); return false;}
if (
    d.email.value!='' && (
      d.email.value.indexOf(".") == -1 ||
      d.email.value.indexOf("@") == -1
    )
) {alert('Please enter a valid e-mail address!'); return false;}
if (d.subject.value=='') {alert('Please write a subject!'); return false;}
if (d.message.value=='') {alert('Please write a message!'); return false;}
return true;
}