function save(){
	if(document.getElementById("content").value.trim()==""){
		alert("请填写留言内容");
		document.getElementById("content").focus();
		return ;
	}
	if(document.getElementById("checkNo").value.trim().length!=4){
		alert("请输入验证码");
		document.getElementById("checkNo").focus();
		return ;
	}
	document.getElementById("mfm").submit();
}

function messages(infoId){
	var showhtml=document.getElementById("messageInfo").innerHTML;
	var html=document.getElementById("msgModel").innerHTML;
	if(showhtml==""||showhtml==" "){
		document.getElementById("messageInfo").innerHTML=html;
		document.getElementById("msgModel").innerHTML="";
	}else{
		document.getElementById("messageInfo").innerHTML=" ";
		document.getElementById("msgModel").innerHTML=showhtml;
	}
	
}

function img(){
	var dd=document.getElementById("checkimages").innerHTML;
	if(dd==""||dd==" "){
		var imgsrc=document.getElementById("app").value+"/image.jsp?type=htmlMessage";
		var html="<img id=imgcheck src='"+imgsrc+"' title=\"单击重新获取验证码\" class=hand onclick='changeimagecheck();'>";
		document.getElementById("checkimages").innerHTML=html;
	}
}

function changeimagecheck(){
	var src=document.getElementById("imgcheck").src;
	document.getElementById("imgcheck").src=src;
}

String.prototype.trim = function () {
	return this.replace(/^\s+|\s+$/g, "");
};