Jsp跟JavaScript

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%> 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html> 
<head> 
<title>?添加题目</title> 
<meta http-equiv="pragma" content="no-cache"> 
<meta http-equiv="cache-control" content="no-cache"> 
<meta http-equiv="expires" content="0"> 
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
<meta http-equiv="description" content="This is my page"> 
<!--<link rel="stylesheet" type="text/css" href="styles.css">--> 

<!-- 保证题目标题，内容和答案输入不为空和空格 --> 
<script type="text/javascript"> 
function check(){ 
if(document.forms[0].title.value.replace(/(^\s+)|\s+$/g,"") == ""){ 
alert("您必须输入题目标题！"); 
document.all.title.focus(); 
return false; 
} 
if(document.forms[0].question.value.replace(/(^\s+)|\s+$/g,"") == ""){ 
alert("您必须输入题目内容！"); 
document.all.question.focus(); 
return false; 
} 
if(document.forms[0].answer.value.replace(/(^\s+)|\s+$/g,"") == ""){ 
alert("您必须输入题目答案！"); 
document.all.answer.focus(); 
return false; 
} 
return true; 
} 
</script> 


</head> 

<body onload="document.all.title.focus();" text=brown > 


<form action="insertDB.jsp" method="post" onsubmit="return check();"> 
<table> 
<TR> 
<font color=red size="6">在线答题系统－－添加新题 </font> 
<hr size=3 color=Black width=550 align=center> 
</TR> 
<!--题目标题的输入，长度不超过22字符 --> 
<tr> 
<td> 
题目标题 
</td> 
<td> 
<input type="text" name=title value="" size="22" maxlength="22" 
tabindex="1"> 
</td> 
<td> 
* 题目标题内容不超过22字节且不能为空 
</td> 
</tr> 
<!--题目内容的输入，内容不超过200个字符 --> 
<tr> 

<td> 
题目内容 
</td> 
<td> 
<textarea name=question rows=5 cols=20 maxlength="200"></textarea> 
</td> 
<td> 
* 内容包括题干和供选答案两部分且不为空 
</td> 
</tr> 
<!--题目答案的输入，只能输入一个字符 --> 
<tr> 
<td> 
题目答案 
</td> 
<td> 
<input name=answer value="" size="22" maxlength="1"> 
</td> 
<td> 
* 答案为正确答案前的字母且不为空，如：A 
</td> 
</tr> 

<!--题目难度级别的输入--> 
<tr> 
<td> 
题目级别 
</td> 
<td> 
<select name=levels> 
<option value="1"> 
初级 
<option value="2"> 
中级 
<option value="3"> 
高级 
</select> 
</td> 
<td> 
选择题目的困难级别 
</td> 
</tr> 

<!--题目类型的选择输入 --> 
<tr> 
<td> 
题目类型 
</td> 
<td> 
<select name=questiontype> 
<option value="1"> 
选择题 
<option value="2"> 
判断题 
</select> 
</td> 
<td> 
选择题目的类型 
</td> 
</tr> 

<!--确认内容，进行提交--> 
<tr> 
<td> 
<input type=submit value="提交"> 
</td> 
<td> 
<input type=reset value="重写"> 
</td> 
</tr> 
</table> 
</form> 
</body> 
</html>