move caret to beginning

gistfile1.txt

function moveCaretToStart(el) {
    if (typeof el.selectionStart == "number") {
        el.selectionStart = el.selectionEnd = 0;
    } else if (typeof el.createTextRange != "undefined") {
        el.focus();
        var range = el.createTextRange();
        range.collapse(true);
        range.select();
    }
}

moveCaretToStart(document.forms["post"].elements["message"]);

// credit: http://stackoverflow.com/questions/3356770/need-cursor-at-beginning-of-text-in-textarea/3357143#3357143