简单程序的小问题。接分了。
初学jsp在试着写了个登陆界面但调用不了javascript里的函数请大家帮忙看看哈。 
  <%@   page   contentType= "text/html;   charset=gbk "   language= "java "   import= "java.sql.* "   
errorPage= " "   %>    
  <script   language= "javascript ">  
 function   on_submit() 
 { 
 	if(form1.username.value= " ") 
 	{ 
 		alert( "用户名不为空,请输入用户名 "); 
 		form1.username.focus(); 
 		return   false; 
 	} 
 	if(form1.code.value= " ") 
 	{ 
 		alert( "密码不能为空 "); 
 		form1.code.focus(); 
 		return   false; 
 	} 
 	if(form1.reputcode.value!=form1.code.value) 
 	{ 
 		alert(两次输入密码不一致); 
 		form1.code.reputcode.focus(); 
 		return   false; 
 	} 
 	if(form1.email.value.length!=0) 
 	{ 
 		for(i=0;i <form1.email.value.length;i++) 
 		{ 
 			if(form1.email.value.charAt(i)==@) 
 				break; 
 		} 
 		if(i==form1.email.value.length) 
 		{ 
 			alert( "错误email地址 "); 
 			form1.email.focus(); 
 			return   false; 
 		} 
 	} 
 } 
  </script> 	  	  	 
  <html>  
  <head>  
  <title> Untitled   Document </title>  
  </head>  
  <body>    
  <center> 新用户注册 </center>  
  <form   name= "form1 "   method= "POST "   action= "acceptUserregist.jsp "   onsubmit= "return   on_submit() ">    
 用户名(*): <input   type= "text "   name= "username "   />  <br>  
 密码(*): <input   type= "text "   name= "code "   />  <br>     
 请再输入一次密码(*): <input   type= "text "   name= "reputcode "   />  <br>  
 性别 <input   type= "radio "   value= "男 "   checked= "checked "   name= "sex "   /> 男 <input   type= "radio "   value= "女 "   name= "sex "   /> 女 <br>  
 出生年月 <input   type= "text "   name= "year "   size= "4 "   /> 年 
  <select   name= "month ">  
 	 <option   value= "1 "   selected= "selected "> 1 </option>  
              <option   value= "2 "> 2 </option>  
              <option   value= "3 "> 3 </option>  
              <option   value= "4 "> 4 </option>  
              <option   value= "5 "> 5 </option>  
              <option   value= "6 "> 6 </option>  
              <option   value= "7 "> 7 </option>  
              <option   value= "8 "> 8 </option>  
              <option   value= "8 "> 9 </option>  
              <option   value= "8 "> 10 </option>  
              <option   value= "8 "> 11 </option>  
              <option   value= "8 "> 12 </option>  
  </select>  
    月 
     <input   type= "text "   name= "day