因此，我希望做的是每半秒钟更改一组<p>标记内的文本。有问题的标签集在我体内的这段代码中：
<div class="outerdiv" id="col2">
<p id="matrixText"></p>
</div>
在上述代码的正下方，我具有应每半秒调用一个函数的JavaScript：
<script type="text/javascript">
setInterval("changeMatrixText()", 500);
</script>
我在脑海中定义了函数
changeMatrixText：function changeMatrixText()
{
var newtext = "";
for (var i = 0; i < 1000; i++)
newtext += Math.floor((Math.random()*10)+1) % 2 ? "0" : "1";
document.getElementById("matrixText").value = newtext;
}
如您所见，这应该将文本设置为0和1的随机字符串。但这不起作用。知道为什么吗？
万一您需要查看我的整个代码...
<html>
<head>
<title>Simple encrypt/decrypt</title>
<style type="text/css">
body
{
background-color: #A9F5F2;
width: 900px;
padding: 0px;
}
.outerdiv
{
margin: 5px;
border: 2px solid #FF8000;
background-color: #FFFFFF;
}
.outerdiv > p
{
margin: 5px;
word-wrap:break-word
}
.outerdiv > h1
{
margin: 5px;
}
#col1
{
width: 500x;
height: 800px;
float: left;
}
#col2
{
width: 295px;
height: 1500px;
float: right;
font-family: Courier New;
overflow: hidden;
}
#title1div
{
font-family: Arial;
width: 100%;
}
#insctdiv
{
font-family: Arial;
width: 100%;
}
#iptdiv
{
height: 400px;
width: 100%;
}
#buttonsdiv
{
text-align: center;
width: 100%;
}
#inputText
{
width: 100%;
height: 100%;
resize: none;
}
</style>
<script type="text/javascript">
function encrypt()
{
var text = document.getElementById("inputText").value;
newstring = "";
/* Make newstring a string of the bit representations of
the ASCII values of its thisCharacters in order.
*/
for (var i = 0, j = text.length; i < j; i++)
{
bits = text.charCodeAt(i).toString(2);
newstring += new Array(8-bits.length+1).join('0') + bits;
}
/* Compress newstring by taking each substring of 3, 4, ..., 9
consecutive 1's or 0's and it by the number of such consecutive
thisCharacters followed by the thisCharacter.
EXAMPLES:
"10101000010111" --> "10101401031"
"001100011111111111111" --> "0011319151"
*/
newstring = newstring.replace(/([01])\1{2,8}/g, function($0, $1) { return ($0.length + $1);});
document.getElementById("inputText").value = newstring;
}
function decrypt()
{
var text = document.getElementById("inputText").value;
text = text.trim();
text.replace(/([2-9])([01])/g,
function (all, replacementCount, bit) {
return Array(+replacementCount + 1).join(bit);
}).split(/(.{8})/g).reduce(function (str, byte) {
return str + String.fromCharCode(parseInt(byte, 2));
}, "");
document.getElementById("inputText").value = text;
}
function changeMatrixText()
{
var newtext = "";
for (var i = 0; i < 1000; i++)
newtext += Math.floor((Math.random()*10)+1) % 2 ? "0" : "1";
document.getElementById("matrixText").value = newtext;
}
</script>
</head>
<body>
<div id="col1">
<div class="outerdiv" id="title1div">
<h1>Reversible text encryption algorithm</h1>
</div>
<div class="outerdiv" id="insctdiv">
<p>Type in or paste text below, then click <b>Encrypt</b> or <b>Decrypt</b></p>
</div>
<div class="outerdiv" id="iptdiv">
<textarea id="inputText" scrolling="yes"></textarea>
</div>
<div class="outerdiv" id="buttonsdiv">
<button onclick="encrypt()"><b>Encrypt</b></button>
<button onclick="decrypt()"><b>Decrypt</b></button>
</div>
</div>
<div class="outerdiv" id="col2">
<p id="matrixText"></p>
</div>
<script type="text/javascript">
setInterval("changeMatrixText()", 500);
</script>
</body>
</html>
本质上，我想让页面的右列继续每半秒在新的字符串0和1内打印一次，就像您在电影《黑客帝国》中的计算机屏幕上那样，如果您发现我的漂流情况。
最佳答案
根据MDN，具有值属性的元素包括<button>，<option>，<input>，<li>，<meter>，<progress>和<param>。您需要改为设置innerHTML。
document.getElementById("matrixText").value = newtext;
至
document.getElementById("matrixText").innerHTML = newtext;
和
setInterval("changeMatrixText()", 500);
至
setInterval(changeMatrixText, 500);
Working Demo