在JavaScript中表格數

switch語句

請有人可以幫我做一個switch語句與形式的代碼來檢查類似：在JavaScript中表格數

<script language="JavaScript"> 
<!-- 
function verifyPerf(form){ 
    var myEntry = form.number(); //check the edit box number, didn't know how?! 
    var firstPart = "1. You need to do thing 1"; 
    var endPart = "2. You need to to do thing 2"; 

switch(myEntry){ 
    case "<= 3000" : 
     alert(firstPart); 
     break; 
    case ">3000 and <9000" : 
     alert(endPart); 
     break; 
    //would like to add 3 more cases 
    default : 
     alert('You have entered an invalid performance number'); 
    } 
} 
--> 
</script> 
</head> 
<body> 
<form name="myForm"> 
<b>Please enter your performance number:</b><br> 
    <input type=number value="" name="perfNumber"> 
    <input type=BUTTON value="Verify" name="myButton" onClick='verifyPerf(this.form)'> 
</form> 
</body> 
</html>

感謝您的幫助。 Lx

還有這個零件不起作用。 function verifyPerf（form）{var myEntry = form.value;

..... 和形式：

請輸入性能：

來源

2014-03-04 user3268282

這不是'switch'的設計目的，它是'if（）{} else if（）{}/* etc */else {}'的設計目的。 –