function chk()
{
	var c=document.getElementsByTagName("input");
	for (var i=0; i < c.length;i++)
	{
		if(c[i].value==null || c[i].value=="")
		{
		 alert("不能有空值！");
		 return false;
		}
	}
	alert("提交成功，审核后可显示！");
	return true;
}
function query(){

	var messageId = document.getElementById("queryMessageId").value;
	if( messageId == ""){
		alert("请输入信件ID");
		return false;
	}
	
	window.location="messageBoard.jsf?id="+messageId;


	
}
function chkNum(v)
{
	if(isNaN(v.value))
	{
		 alert("号码必须是数字！");
		  v.value="";
		  v.focus();
		 return false;
	}
}
function chkemail(obj){
    var email=obj.value;
    var pattern=/^([a-zA-Z0-9])+@([a-zA-Z0-9])+\.([a-zA-Z0-9])+/;
    flag=pattern.test(email);
    if(flag) {
          
        return true;
    } else{
         alert("很抱歉，您所输入的邮箱有误，请确认后填写");
        obj.focus();
        obj.select();
        return false;
    }
}