/* Source: http://www.scottklarr.com/topic/425/how-to-insert-text-into-a-textarea-where-the-cursor-is/ */

function insertAtCaret(areaId, text) {
    var txtarea = document.getElementById(areaId);
    var scrollPos = txtarea.scrollTop;
    var strPos = 0;
    var br = ((txtarea.selectionStart || txtarea.selectionStart == '0') ? "ff" : (document.selection ? "ie" : false ) );

    if (br == "ie")
    {
        txtarea.focus();
        var range = document.selection.createRange();
        range.moveStart ('character', -txtarea.value.length);
        strPos = range.text.length;
    }
    else if (br == "ff")
        strPos = txtarea.selectionStart;

    var front = (txtarea.value).substring(0,strPos);
    var back = (txtarea.value).substring(strPos,txtarea.value.length);

    txtarea.value=front+text+back;
    strPos = strPos + text.length;

    if (br == "ie")
    {
        txtarea.focus();
        var range = document.selection.createRange();
        range.moveStart ('character', -txtarea.value.length);
        range.moveStart ('character', strPos);
        range.moveEnd ('character', 0);
        range.select();
    }
    else if (br == "ff")
    {
        txtarea.selectionStart = strPos;
        txtarea.selectionEnd = strPos;
        txtarea.focus();
    }

    txtarea.scrollTop = scrollPos;
}