// Author: Diego Perini <dperini@nwbox.com>
//var sb = new Array(
//    'leftbox', 'rightbox', 'scrollLeft', 'scrollRight',
//    'caretPos', 'maxLength', 'textLength', 'availLength',
//    'beforeCaret', 'afterCaret', 'selectedText'
//)
//
//for (var i in sb) eval('var ' + sb[i] + ' = {}')
//
//var os = 0
//var oe = 0
//function updateCursor(o) {
//    var t = o.value, s = getSelectionStart(o), e = getSelectionEnd(o)
//    if (s == os && e == oe) return
//    caretPos.firstChild.nodeValue = s
//    maxLength.firstChild.nodeValue = o.getAttribute('maxLength')
//    textLength.firstChild.nodeValue = t.length
//    availLength.firstChild.nodeValue = o.getAttribute('maxLength') - t.length
//    afterCaret.firstChild.nodeValue = t.substring(s).replace(/ /g, '\xa0') || '\xa0'
//    beforeCaret.firstChild.nodeValue = t.substring(0, s).replace(/ /g, '\xa0') || '\xa0'
//    selectedText.firstChild.nodeValue = t.substring(s, e).replace(/ /g, '\xa0') || '\xa0'
//    rightbox.value = scrollRight.firstChild.nodeValue = t.substring(s).replace(/ /g, '\xa0') || '\xa0'
//    leftbox.value = scrollLeft.firstChild.nodeValue = t.substring(0, s).replace(/ /g, '\xa0') || '\xa0'
//    os = s
//    oe = e
//    return true
//}

function setupCursor() {
    for (var i in sb) eval(sb[i] + ' = document.getElementById(sb[i])')
    updateCursor(document.getElementById('textbox'))
}

function getSelectionStart(o) {
    if(o.type == 'textarea'){
        return o.value.length;
    } else {
        if (o.createTextRange) {
            var r = document.selection.createRange().duplicate()
            r.moveEnd('character', o.value.length)
            if (r.text == '') return o.value.length
            return o.value.lastIndexOf(r.text)
        } else return o.selectionStart
    }
}

function getSelectionEnd(o) {
    if (o.createTextRange) {
        var r = document.selection.createRange().duplicate()
        r.moveStart('character', -o.value.length)
        return r.text.length
    } else return o.selectionEnd
}

function textSelect(inp, s, e) {
        e = e || s;
        if (inp.createTextRange) {
            var r = inp.createTextRange();
            r.collapse(true);
            r.moveEnd('character', e);
            r.moveStart('character', s);
            r.select();
        }else if(inp.setSelectionRange) {
            inp.focus();
            inp.setSelectionRange(s, e);
        }
    }