我正在使用php / javascript构建一个小型实验,人们必须对某些单词定义的答案的熟悉程度进行评分。当给定定义时,参与者必须按空格才能看到答案,并且必须按1到7的等级对其进行评级。单击其中一个单选按钮后,将显示下一个定义。这在Chrome中运行良好,但在Firefox中,在第一个定义之后,带有单选按钮的表单不断提交自身:它显示一个实例,然后进入下一个定义。此外,在IE中似乎没有任何工作。我不知道是什么导致了这种行为。这是代码:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Experiment</title>
<link rel="stylesheet" href="style.css" type="text/css" media="screen, projection">
<script type="text/javascript" src="jquery.js"></script>
</head>
<body>
<script type="text/javascript" >
$(document).ready(function(){
var definitions = ['Solipsism: The philosophical position that I alone exist.',
'Ribosomes: The site of protein synthesis in the cell.',
'Microglia: Very small cells that remove waste material.'
];
var responses = [];
var defCount = -1;
var loadDefinition = function () {
defCount++;
if (defCount < definitions.length) {
var defString = definitions[defCount];
var definition = defString.split(': ');
$('#sentence').text(definition[1]);
$('#sentence').show();
}
else {
// done
$('#sentence').html('<b>The experiment is done. Thank you for participating!</b>');
$('#sentence').show();
saveData();
}
};
var handleResponse = function () {
// get sentence + id
var defString = definitions[defCount];
var definition = defString.split(': ');
responses[responses.length] = 999;
$('#sentence').hide();
$('#scale').show();
$('#answer').html('The answer was: <b>'+definition[0]+'</b><br><br>');
};
// capture space press
$(document).keypress(function(e) {
if (e.charCode == 32 || e.keyCode == 32) {
handleResponse();
}
return false;
});
// capture likert scale response
$('#init-form').submit(function() {
$('#init').hide();
loadDefinition();
return false;
});
$("[name=likert]").click(function(){
// get the value
var fam_val = $("[name=likert]:checked").val();
$('[name=likert]').attr('checked', false);
$('#scale').hide();
// load new definition
loadDefinition();
return false;
});
// some init
$('#sentence').hide();
$('#scale').hide();
}); // $(document)
</script>
<div class="mainarea">
<h1>Definition Familiarity Experiment</h1><br>
<div id="box">
<div id="init">
<form id="init-form">
<input type="submit" value="Begin Experiment" />
</form>
</div>
<div id="sentence"></div>
<div id="scale">
<div id="answer"></div>
<form id="scale-form">
<table width="100%">
<tr>
<td></td>
<td align="center">1</td>
<td align="center">2</td>
<td align="center">3</td>
<td align="center">4</td>
<td align="center">5</td>
<td align="center">6</td>
<td align="center">7</td>
<td></td>
</tr>
<tr><td align="center">totally unfamiliar</td>
<td align="center"><input type="radio" name="likert" value="1"></td>
<td align="center"><input type="radio" name="likert" value="2"></td>
<td align="center"><input type="radio" name="likert" value="3"></td>
<td align="center"><input type="radio" name="likert" value="4"></td>
<td align="center"><input type="radio" name="likert" value="5"></td>
<td align="center"><input type="radio" name="likert" value="6"></td>
<td align="center"><input type="radio" name="likert" value="7"></td>
<td align="center">knew the answer</td>
</tr>
</table>
</form>
<input id="scale-form-submit" type="submit" value="Submit">
</div>
</div>
</div>
</body>
</html>
答案 0 :(得分:2)
在Firefox中,显然,在第一次单击单选按钮后,它会保留焦点。
这意味着单选按钮将接收后续的按键事件,从而执行其“click”事件处理程序。
我建议您使用事件对象preventDefault()方法而不是返回“false”来捕获“keyup”事件:
$(document).keyup(function(e) {
if (e.which==32 ) {
e.preventDefault();
handleResponse();
}
});
顺便说一下,你可以使用事件对象的“which”属性来确定按下了哪个键。