window.location.href错误

window.location.href异常
JS语句：

JScript code

 function inquireInformation(option)    {           var value=option.value;        alert(value);        if(value=="student")        {            window.location.href="teacher_selectStudents.jsp";        }        else if(value="teacher")        {            window.location.href="teacher_selectTeachers.jsp";        }        else if(value="sc")        {            window.location.href="teacher_selectGrade.jsp";        }        else if(value="allKeBiao")        {            window.location.href="teacher_selectAllKeBiao.jsp";        }        else if(value="singleKeBiao")        {            window.location.href="teacher_selectSingleKeBiao.jsp";        }        else{alert("hahah");}    }

HTML语句：

HTML code

    <select id="infomation" onChange="inquireInformation(this)">         <option>查询信息</option>         <option  value="student">查询全部学生信息</option>         <option value="teacher">查询全部教师信息</option>         <option value="sc">查询全部学生成绩</option>         <option value="allKeBiao">查询全部课表</option>         <option value="singleKeBiao">查询个人课表</option>       </select>

选择第三个及以下option（查询全部学生成绩以下），都一直跳到第二个界面上（查询全部教师信息界面），而不会跳到规定的页面。
也就是说只有前两个option跳转正常，下面的option的就直接跳到第二个option所跳转的界面


[解决办法]
楼主你没有发现你小了一个“=”？
value=="student"，这个正确
value="teacher"，这个就不正确了，它是个赋值语句，不是个判断语句。
但是if (value="teacher")永远是“真”，因为value不为空，所以除了第一个判断，其它全部都执行
window.location.href="teacher_selectTeachers.jsp";
[解决办法]

JScript code

function inquireInformation(option)    {           var value=option.value;        alert(value);        if(value=="student")        {            window.location.href="teacher_selectStudents.jsp";        }        else if(value[color=#FF0000]=[/color]"teacher")        {            window.location.href="teacher_selectTeachers.jsp";        }        else if(value[color=#FF0000]=[/color]"sc")        {            window.location.href="teacher_selectGrade.jsp";        }        else if(value[color=#FF0000]=[/color]"allKeBiao")        {            window.location.href="teacher_selectAllKeBiao.jsp";        }        else if(value[color=#FF0000]=[/color]"singleKeBiao")        {            window.location.href="teacher_selectSingleKeBiao.jsp";        }        else{alert("hahah");}    }
[解决办法]
 else if(value="teacher")

[解决办法]
function inquireInformation(option)
   {
          var value=option.value;
       alert(value);
       if(value=="student")
       {
           window.location.href="teacher_selectStudents.jsp";
       }
       else if(value=="teacher")
       {
           window.location.href="teacher_selectTeachers.jsp";
       }
       else if(value="sc")
       {
           window.location.href="teacher_selectGrade.jsp";
       }
       else if(value=="allKeBiao") 
 
       {
           window.location.href="teacher_selectAllKeBiao.jsp";
       }
       else if(value=="singleKeBiao")
       {
           window.location.href="teacher_selectSingleKeBiao.jsp";
       }
       else{alert("hahah");}
   }
 

 

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