var txtArea = $("#"+now_edit_code)[0];
var regExp = new RegExp("{圖片}"); //只限製圖片
var content = txtArea.value;
layer.close(imgMsg);
if(regExp.exec(content) && $(this).index() == 0) {
imgMsg = layer.msg("圖片變量只能用一次");
return;
}
var start = txtArea.selectionStart; //初始位置
txtArea.value = content.substring(0, txtArea.selectionStart) + $(this).text() + content.substring(txtArea.selectionEnd, content.length);
var position = start + $(this).text().length;
$("#"+now_edit_code).focus();
txtArea.setSelectionRange(position, position);