我有以下代码,假设显示那些选中的复选框的值。但是,它似乎并没有按原样工作。
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
</head>
<body>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<script type="text/javascript">
function myFunction() {
var checkedvalue = "";
var arrChecks = document.getElementById("blah");
for (i = 0; i < arrChecks.length; i++) {
var attribute = arrChecks[i].getAttribute("blah")
if (attribute == elementName) {
// if the current state is checked, unchecked and vice-versa
if (arrChecks[i].checked) {
arrChecks[i].checked = false;
} else {
arrChecks[i].checked = true;
checkedvalue = checkedvalue + " " + arrChecks[i].toString();
}
} else {
arrChecks[i].checked = false;
}
}
document.getElementById("demo").innerHTML = checkedvalue;
}
function makeCheckboxes(str) {
var a = document.getElementById("blah");
var arr = str;
var returnStr = "";
for (i = 0; i < arr.length; i++) {
returnStr += '<input type="checkbox" name="theCheckbox" value="' + arr[i] + '" />' + arr[i];
}
a.innerHTML = returnStr;
}
window.onload = function () {
var arrt = ["test1", "test2", "apple", "samsung", "nokia"];
makeCheckboxes(arrt);
};
</script>
<style type="text/css"></style>
</head>
<body>
<table border="1">
<tr>
<td id="blah"></td>
<td>checkboxes should appear left of here</td>
<button onclick="myFunction()">Click me</button>
<p id="demo"></p>
</tr>
</table>
</body>
如果有善良的灵魂可以启发我,将不胜感激。