<script language="JavaScript" type="text/JavaScript">
<!--
function checkin()
{
if (Form.temp.value == "")
{
alert("请输入!");
Form.temp.focus();
return (false)
}//-->
</script><form onsubmit="return checkin()" name="Form">
<input name="temp" type="text">
<input type="submit" value="submit">
</form>
<!--
function checkin()
{
if (Form.temp.value == "")
{
alert("请输入!");
Form.temp.focus();
return (false)
}//-->
</script><form onsubmit="return checkin()" name="Form">
<input name="temp" type="text">
<input type="submit" value="submit">
</form>
<!--
function checkin()
{
if (Form.temp.value == "")
{
alert("请输入!");
Form.temp.focus();
return (false)
}//-->
</script><form onsubmit="return checkin()" name="Form">
<select name="temp">
<option value=""></option>
<option value="1">temp1</option>
<option value="2">temp2</option>
<option value="3">temp3</option>
</select>
<input type="submit" value="submit">
</form>
<!--
function checkin()
{
if (Form.temp.value == "")
{
alert("请输入!");
Form.temp.focus();
return (false)
}
}
//-->
</script><form onsubmit="return checkin()" name="Form">
<select name="temp">
<option value=""></option>
<option value="1">temp1</option>
<option value="2">temp2</option>
<option value="3">temp3</option>
</select>
<input type="submit" value="submit">
</form>