function checkContent()
 {
	var dw=document.getElementById("CommentContent")
	if (dw.value=='')
	   {
		alert("请输入您要评论的内容");
		return false;
	   }
 }
function face(num)
{
  var dw=document.getElementById("CommentContent")
  dw.value=dw.value+"[face"+num+"]"
}