单击按钮时未调用我的javascript函数
[英]my javascript function is not called on button click
问题描述
I have this code: 
我有以下代码：
<script language="javascript">
var noun=["cat","mat","rat"];
var verb=["like","is","see","sees"];
var object=["me","a+noun","the+noun"];
var subject=["I","a+noun","the+noun"];
var sentence=(subject+verb+object);
function checkCorrectness(){
var input=document.getElementbyId("userInput");
if(input==sentence)
{
alert("congratulations your sentence is correct");
}
else if(input=="null"||"")
{
alert("your entered a blank text, please enter sentence");
}
else{
alert("Sorry, Your sentence is incorrect, your sentence should be in the form of a subject, verb and object. please try again");
}
};
</script>
</head>
<body>
<h1><font size="3" color="black" face="comic sans ms">Welcome to Micro English</font></h1>
<h2><font size="2" color="blue" face="comic sans ms">Please Enter a sentence in micro English in the box below</font></h2>
<form onsubmit="checkCorrectness();">
<input type="text" name="input" id="userInput"/>
<input type="submit"value="go"/>
</form>
but when I click the "go" button nothing happens.what could be the problem? 但是当我单击“执行”按钮时，什么也没发生。可能是什么问题？ I have tried changing the type of input but it has never ran, I had a similar program that did run but I just cnt put my finger on the problem here. 我尝试过更改输入的类型，但是它从未运行过，我有一个确实运行过的类似程序，但是我只是想把问题放在这里。 please help 请帮忙
3 个解决方案
解决方案1
1 2013-08-15 19:24:03
this code is working .. 该代码正在工作..
<script language="javascript">
var noun=["cat","mat","rat"];
var verb=["like","is","see","sees"];
var object=["me","a+noun","the+noun"];
var subject=["I","a+noun","the+noun"];
var sentence=(subject+verb+object);
function checkCorrectness(){
var input=document.getElementById("userInput").value;
if(input==sentence.length)
{
alert("congratulations your sentence is correct");
}
else if(input==null || input =="")
{
alert("your entered a blank text, please enter sentence");
}
else{
alert("Sorry, Your sentence is incorrect, your sentence should be in the form of a subject, verb and object. please try again");
}
};
</script>
</head>
<body>
<h1><font size="3" color="black" face="comic sans ms">Welcome to Micro English</font></h1>
<h2><font size="2" color="blue" face="comic sans ms">Please Enter a sentence in micro English in the box below</font></h2>
<form onsubmit="checkCorrectness();">
<input type="text" name="input" id="userInput"/>
<input type="submit"value`enter code here`="go"/>
</form>
解决方案2
0 2013-08-15 19:11:23
getElementbyId is missing the capital B - should be getElementById getElementbyId缺少大写getElementById B应该是getElementById
Also the things that I mentioned in the comments need to be fixed. 另外，我在评论中提到的内容也需要修复。
解决方案3
0 2013-08-15 19:14:59
You should do this: 你应该做这个：
var input=document.getElementbyId("userInput");
var inputtext=input.value;
Now use inputtext instead of input for comparison. 现在使用inputtext而不是input进行比较。
Or just: 要不就：
var input=document.getElementbyId("userInput").value;
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