我无法弄清楚为什么我的网页无效。当我尝试加载它时,它只是给我一个白色的屏幕。有遗漏的代码吗?我不知道我的空间是否也很重要。这是我的代码:
<!DOCTYPE html>
<html>
<head><body>
<title>Initializing an Array</title>
<style type="text/css">
table {width:10em}
th {text-align:left}
</style>
<script language="JavaScript">
<!--
{//create (declare) two new arrays
var n1=new Array(5); //allocate five-element Array
var n2=new Array (); //allocate empty Array
//assign values to each element of Array n1
for ( var i = 0; i <n1.length; ++i )
n1[ i ] = i;
//create and initialize five elements in Array n2
for ( i=0; i <5; ++i )
n2[ i ] = i;
outputArray("Array n1:",n1);
outputArray("Array n2:",n2);
//output the heading followed by a two-column table
//containing subscripts and elements of "theArray"
function outputArray (heading,theArray)}
{
document.writeln("<h2>"+heading+"</h2>");
document.writeln("table border=\"1\"");
document.writeln("<thead><th>Subscripts</th>"+"<th>Value</th></thead> <tbody>");
//output the subscript and value of each array element
for ( var i = 0; i <theArray.length; i++ )
document.writeln("<tr><td>+i+"</td><td>"+theArray[i]+"</td></tr>");
document.writeln("/tbody></table>");
} //end function outputArray
//-->
</script>
</head></body>
</html>
请帮忙!感谢。
答案 0 :(得分:1)
你破坏了HTML和无效的Javascript。
<script language="JavaScript">
对于DOCTYPE
html,除了<script>
之外,无需为src
标记指定任何属性,只有在加载外部脚本文件时才需要。并且没有属性language
。您可能意味着type="text/javascript"
,但这是默认值,因此是多余的。
<!--
您不能在<script>
块中包含HTML注释。您告诉浏览器<script>
块中的内容是Javascript,然后您输入无效的javascript。控制台中可能会显示错误。
你的例子,整理,看起来像这样:
<script>
// create (declare) two new arrays
var n1 = new Array(5); //allocate five-element Array
var n2 = new Array(); //allocate empty Array
// assign values to each element of Array n1
for (var i = 0; i < n1.length; ++i) {
n1[ i ] = i;
}
// create and initialize five elements in Array n2
for (i=0; i < 5; ++i) {
n2[ i ] = i;
}
outputArray("Array n1:",n1);
outputArray("Array n2:",n2);
// output the heading followed by a two-column table
// containing subscripts and elements of "theArray"
function outputArray (heading, theArray) {
var html = '<h2>' + heading + '</h2>';
html += '<table border="1">';
html += '<thead><th>Subscripts</th><th>Value</th></thead>';
html += '<tbody>';
// output the subscript and value of each array element
for (var i = 0; i < theArray.length; i++) {
html += '<tr><td>' + i + '</td><td>' + theArray[i] + '</td></tr>';
}
html += '</tbody></table>';
var div = document.createElement('div');
div.innerHTML = html;
document.body.appendChild(div);
}
</script>
答案 1 :(得分:0)
您忘记了引用"
以及最后<
循环中</tbody>
的下一行for
。
document.writeln("<tr><td>"+i+"</td><td>"+theArray[i]+"</td></tr>");
^
document.writeln("</tbody></table>");
^
答案 2 :(得分:0)
当然没有显示任何内容,基本HTML布局完全错误。
您写道:
<head>
<body>
(all the stuff)
</head>
</body>
应该是:
<head>
(scripts.....)
</head>
<body>
(HTML....)
</body>