日期:2014-05-18  浏览次数:20636 次

帮我看看这个问题的原因
源代码如下:
<%@   page   contentType= "text/html;   charset=gb2312 "   language= "java "     errorPage= " "   %>
<!DOCTYPE   HTML   PUBLIC   "-//W3C//DTD   HTML   4.01   Transitional//EN "   "http://www.w3.org/TR/html4/loose.dtd ">
<html>
<head>
<meta   http-equiv= "Content-Type "   content= "text/html;   charset=gb2312 ">
<title> 注册 </title>
</head>

<script   language= "javascript ">
function   regist()
{

    if(document.form1.company.value== " "   ||   document.form1.company.value==null)
    window.alert( "请输入公司名! ");

    if(document.form1.principal.value== " "   ||   document.form1.principal.value==null)
 
    window.alert( "请输入负责人! ");

    if(document.form1.operation.value== " "   ||   document.form1.operation.value==null)

    window.alert( "请输入公司性质! ");
   
    if(document.form1.password.value== " "   ||   document.form1.password.value=null)
 
    window.alert( "请输入密码! ");
   
    if(document.form1.tel.value== " "   ||   document.form1.tel.value==null)

    window.alert( "请输入电话号码! ");

    if(document.form1.email.value== " "   ||   document.form1.email.value==null)
   
    window.alert( "请输入电子邮件! ");

}


</script>

<body>
<form   name= "form1 "   method= "post "   action= " ">
    <table   width= "574 "   height= "222 "   border= "1 "   align= "center ">
        <tr>
            <td   colspan= "2 "> <div   align= "center ">
                    <h1> <strong> 注册 </strong> </h1>
            </div> </td>
        </tr>
        <tr>
            <td   width= "211 ">
                <div   align= "right "> 公司名   :   </div> </td>
            <td   width= "347 "> <input   type= "text "   name= "company "> </td>
        </tr>
        <tr>
            <td>
                <div   align= "right "> 负责人   :   </div> </td>
            <td> <input   type= "text "   name= "principal "> </td>
        </tr>