js設置光標位置

根據瀏覽器判斷，來定位光標的位置：

經過$.browser.msie來判斷是不是IE瀏覽器 

$(function() {
        $("#txt").click(function() {
            var position = 0;
            var txtFocus = document.getElementById("txt");
            if ($.browser.msie) {
                var range = txtFocus.createTextRange();
                range.move("character", position);
                range.select();
            }
            else {
                //obj.setSelectionRange(startPosition, endPosition);
                txtFocus.setSelectionRange(position, position);
                txtFocus.focus();
            }
        });
    });