开发者 https://www.devze.com 2023-03-28 23:41 出处：网络

I am trying to use some HTML tag inside JavaScript, but the HTML tag does not work. How can U use an HTML tag inside JavaScript? I wanted to use h1 but did not wo开发者_如何学Pythonrk.

相关专题：javascript

I am trying to use some HTML tag inside JavaScript, but the HTML tag does not work. How can U use an HTML tag inside JavaScript? I wanted to use h1 but did not wo开发者_如何学Pythonrk.

if (document.getElementById('number1').checked) {
  <h1>Hello member</h1>
}

You will either have to document.write it or use the Document Object Model:

Example using `document.write`

<script type="text/javascript">
if(document.getElementById('number1').checked) {
    document.write("<h1>Hello member</h1>");
}
</script>

Example using DOM

<h1></h1> <!-- We are targeting this tag with JS. See code below -->
<input type="checkbox" id="number1" checked /><label for="number1">Agree</label>
<div id="container"> <p>Content</p> </div>

<script type="text/javascript">
window.onload = function() {
    if( document.getElementById('number1').checked ) {
        var h1 = document.createElement("h1");
        h1.appendChild(document.createTextNode("Hello member"));
        document.getElementById("container").appendChild(h1);
    }
}
</script>

<html>
 <body>
  <input type="checkbox" id="number1" onclick="number1();">Number 1</br>
  <p id="h1"></p>
   <script type="text/javascript">
    function number1() {
    if(document.getElementById('number1').checked) {

      document.getElementById("h1").innerHTML = "<h1>Hello member</h1>";
         }
    }
   </script>
 </body>
</html>

This is what I used for my countdown clock:

</SCRIPT>
<center class="auto-style19" style="height: 31px">
<Font face="blacksmith" size="large"><strong>
<SCRIPT LANGUAGE="JavaScript">
var header = "You have <I><font color=red>" 
+ getDaysUntilICD10() + "</font></I>&nbsp; "
header += "days until ICD-10 starts!"
document.write(header)
</SCRIPT>

The HTML inside of my script worked, though I could not explain why.

here's how to incorporate variables and html tags in document.write also note how you can simply add text between the quotes

document.write("<h1>System Paltform: ", navigator.platform, "</h1>");

JavaScript is a scripting language, not a HTMLanguage type. It is mainly to do process at background and it needs document.write to display things on browser. Also if your document.write exceeds one line, make sure to put concatenation + at the end of each line.

Example

<script type="text/javascript">
if(document.getElementById('number1').checked) {
document.write("<h1>Hello" +
"member</h1>");
}
</script>

<div id="demo"></div>

<input type="submit" name="submit" id="submit" value="Submit" onClick="return empty()">


<script type="text/javascript">
        function empty()
        {
          var x;
          x = document.getElementById("feedbackpost").value;
          if (x == "")
           {
             var demo = document.getElementById("demo");
             demo.innerHTML =document.write='<h1>Hello member</h1>';
              return false;
           };
        }
    </script>

<div id="demo"></div>

<script type="text/javascript">
    if(document.getElementById('number1').checked) {
        var demo = document.getElementById("demo");    
        demo.innerHtml='<h1>Hello member</h1>';
    } else {
        demo.innerHtml='';
    }
</script>