function flipBox(who) {
var tmp; 
if (document.images['b_' + who].src.indexOf('_on') == -1) { 
tmp = document.images['b_' + who].src.replace('_off', '_on');
document.getElementById('box_' + who).style.display = 'none';
document.images['b_' + who].src = tmp;
} else {
tmp = document.images['b_' + who].src.replace('_on', '_off');
document.getElementById('box_' + who).style.display = 'block';
document.images['b_' + who].src = tmp;
} 
}
function ekle(elname, wrap1, wrap2) { 
if (document.selection) { // for IE 
var str = document.selection.createRange().text;
document.forms['mesajci'].elements[elname].focus();
var sel = document.selection.createRange();
sel.text = wrap1 + str + wrap2;
return;
} else if ((typeof document.forms['mesajci'].elements[elname].selectionStart) != 'undefined') { // for Mozilla
var txtarea = document.forms['mesajci'].elements[elname];
var selLength = txtarea.textLength;
var selStart = txtarea.selectionStart;
var selEnd = txtarea.selectionEnd;
var oldScrollTop = txtarea.scrollTop;
//if (selEnd == 1 || selEnd == 2)
//selEnd = selLength;
var s1 = (txtarea.value).substring(0,selStart);
var s2 = (txtarea.value).substring(selStart, selEnd)
var s3 = (txtarea.value).substring(selEnd, selLength);
txtarea.value = s1 + wrap1 + s2 + wrap2 + s3;
txtarea.selectionStart = s1.length;
txtarea.selectionEnd = s1.length + s2.length + wrap1.length + wrap2.length;
txtarea.scrollTop = oldScrollTop;
txtarea.focus();
return;
} else {
insertText(elname, wrap1 + wrap2);
}
}
function insertText(elname, what) {
if (document.forms['mesajci'].elements[elname].createTextRange) {
document.forms['mesajci'].elements[elname].focus();
document.selection.createRange().duplicate().text = what;
} else if ((typeof document.forms['mesajci'].elements[elname].selectionStart) != 'undefined') { // for Mozilla
var tarea = document.forms['mesajci'].elements[elname];
var selEnd = tarea.selectionEnd;
var txtLen = tarea.value.length;
var txtbefore = tarea.value.substring(0,selEnd);
var txtafter =  tarea.value.substring(selEnd, txtLen);
var oldScrollTop = tarea.scrollTop;
tarea.value = txtbefore + what + txtafter;
tarea.selectionStart = txtbefore.length + what.length;
tarea.selectionEnd = txtbefore.length + what.length;
tarea.scrollTop = oldScrollTop;
tarea.focus();
} else {
document.forms['mesajci'].elements[elname].value += what;
document.forms['mesajci'].elements[elname].focus();
}
}