//设置字体的大小
function ChangeShow(x)
{
  switch (x){
    case 1:
      document.getElementById("maintext").className="fbig";		
						document.getElementById("ftb").className="ft";
						document.getElementById("ftn").className="ffun";
						document.getElementById("fts").className="ffun";
      break;
    case 2:
      document.getElementById("maintext").className="fnomal";
						document.getElementById("ftn").className="ft";
						document.getElementById("ftb").className="ffun";
						document.getElementById("fts").className="ffun";
      break;
    case 3:
      document.getElementById("maintext").className="fsmall";
						document.getElementById("fts").className="ft";
						document.getElementById("ftb").className="ffun";
						document.getElementById("ftn").className="ffun";
      break;
  }
}
function SetBgColor(co)
{
		//setCookie(co);
		try
		{
		   document.getElementById("maincontent").style.backgroundColor='#'+co;
		}
		catch(e)
		{
		}
}
var tip = "我来评两句！";
function reply_checksubmit(id)
{
	if(!checkRepost("replaypost",id))return false;
	if(document.formpost.content.value==tip || document.formpost.content.value.length==0)
	{
		alert('请填写内容');
		return false;
	}
}
function reply_clearfield()
{
	if (document.formpost.content.value == tip)
	{
		document.formpost.content.value = "";
	}
}
function getCookie(cookieName)
{
	var cookieValue = null;
	var posName = document.cookie.indexOf(escape(cookieName) + '=');
	if (posName != -1)
	{
	var posValue = posName + (escape(cookieName) + '=').length;
	var endPos = document.cookie.indexOf(';', posValue);
	if (endPos != -1)
	{
	cookieValue = unescape(document.cookie.substring(posValue, endPos));
	}
	else
	{
	cookieValue = unescape(document.cookie.substring(posValue));
	}
	}
	return cookieValue;
}
function checkRepost(cookieName,classid)
{
	if(getCookie(cookieName)==classid)
	{
		alert("灌水没有这样灌的，休息一会吧！");
		return false;
	}
	else{
		return true;
	}
}