提交前检验数据,没填写则中止提交。
<form onsubmit="return checkform()" name=form1 action="a.asp">
<input name=text1>
<select name=select1>
<option value="">请选择</option>
<option value="1">1</option>
<option value="2">2</option>
</select>
<input type=submit >
<script language=javascript>
<!--
function checkform(){
if(form1.text1.value=="" || form1.select1.value==""){
alert("不能为空");
return false
}
}
//-->
</script>
</form>
<form onsubmit="return checkform()" name=form1 action="a.asp">
<input name=text1>
<select name=select1>
<option value="">请选择</option>
<option value="1">1</option>
<option value="2">2</option>
</select>
<input type=submit >
<script language=javascript>
<!--
function checkform(){
if(form1.text1.value=="" || form1.select1.value==""){
alert("不能为空");
return false
}
}
//-->
</script>
</form>
前台
function ReLoad()
{
var strReLoadFlag =document.Form1.hidReload.value
if(document.all("txtEmployeeCode").value != "" && document.all("dropYear").value != ""
&& document.all("dropMonth").value != "")
{
alert("1");
strReLoadFlag = 1;
return true;
}
}
后台Me.txtEmployeeCode.Attributes.Add("onchange", "return ReLoad();")
Me.dropMonth.Attributes.Add("onchange", "return ReLoad();")
Me.dropYear.Attributes.Add("onchange", "return ReLoad();")
If Me.hidReload.Value.Equals("1") Then
Call searchData()
End If