js验证出错,急!!!!
<script type="text/javascript">
function checkSubmit() {  
	if(required('wname') && required('month') &&  required('day') &&  
			required('fre','1') &&  required('num') && required('wbt') &&
			required('wet') && required('wbt')  && required('wfre','1')){
		if(document.myform.warnMode.checked==true){
			if(required('sbt') && required('set') && required('mfre','1') && required('incepters')){
				return true;
			}
			return false;
		}else{
			return true;
		}	
	}
	return false;
}
/*
  * names:元素ID
  * num:如果不为空,则判断是否为数字
  */
function required(names,num){
	var va = document.getElementById(names).value;
	if(va==''){
		document.getElementById(names+"1").innerHTML='必填项';
		return false;
	}else{
		document.getElementById(names+"1").innerHTML='';
	}	
	if(num!='' && num!=null){
		var reg = /^\d+$/;
	    if(!reg.test(va)){
	    	document.getElementById(names+"1").innerHTML+=',只能为数字';
		    return false;
	    }
	    return true;
	}
	return true;
}
</script>
</head>
<body onload="init();">
	<form name="myform" id="myform" action="warnCondition_doAdd.action"	method="post" onsubmit="return checkSubmit()">
		<table id="mainTable" class="list_table" cellspacing="1"
			cellpadding="1">
			<tr>
				<td colspan="4" class="edit_title">添加预警信息</td>
			</tr>
			<TR>
			<tr>
				<td colspan="4" class="edit_title1">基本信息</td>
			</tr>
			<tr>
				<td class=edit_label style="vertical-align: top;" width="150px">预警名称:</td>
				<td class=edit_content width="300px"><input type="text" name="condition.warnName" id="wname" onblur="required('wname')" />
					<div id="wname1" style="color: red;display:inline">*</div></td>
				<td class=edit_label width="150px">预警对象(表名):</td>
				<td class="edit_content"><select name="condition.warnObj">
						<s:iterator value="modelList" id="modelList">
							<option value="<s:property value="configCode"/>">
								<s:property value="configName" />
							</option>
						</s:iterator>
				</select></td>
			</tr>
			<tr>
				<TD class=edit_label>预警类型:</TD>
				<TD class=edit_content><select name="condition.warnType" >
						<option value="1">缺少数据或无数据</option>
				</select></TD>				
				<TD class=edit_label>数据采集频率:</TD>
				<TD class=edit_content><select id="s1"
					name="condition.gatherFre" onchange="inner()">
						<option value="0">月</option>
						<option value="1">日</option>
						<option value="2">分钟</option>
				</select>
					<div id="innerText0" style="display: none">
						到达时间:<input type='text' readonly  id="month"
							onfocus="WdatePicker({dateFtm:'yyyy-MM-dd'})" name='month'
							size='8' onblur="required('month')"/>
							&