HTML | DOM Underline Object

The DOM underline object is used to represent the HTML <u> element. The underline element is accessed by getElementById().

Syntax:

document.getElementById("id");

Where ‘id’ is the ID assigned to the <u> tag.

Example 1:

<!DOCTYPE html>  
<html>  
    <head> 
        <title> 
            HTML DOM underline Object 
        </title> 
    </head> 
      
    <body style = "text-align:center;">  
      
        <h1 style = "color:green;" >  
            GeeksForGeeks  
        </h1>  
          
        <h2>DOM underline Object</h2>  
  
        <p><u id = "u">GeeksforGeeks!</u> A computer 
        science portal for geeks.</p> 
          
        <button onclick = "Geeks()"> 
            Click Here! 
        </button> 
          
        <script> 
            function Geeks() { 
                var txt = document.getElementById("u"); 
                txt.style.color = "green"; 
            } 
        </script> 
    </body>  
</html>                     

Output:
Before click on the button:
underline
After click on the button:

Example 2: Underline Object can be created by using the document.createElement method.

<!DOCTYPE html>  
<html>  
    <head> 
        <title> 
            HTML DOM underline Object 
        </title> 
    </head> 
      
    <body style = "text-align:center"> 
           
        <h1 style = "color:green;" >  
            GeeksForGeeks  
        </h1>  
          
        <h2>DOM underline Object</h2>  
  
        <button onclick = "Geeks()"> 
            Click Here! 
        </button> 
          
        <p id = "p"></p> 
          
        <script> 
            function Geeks() { 
                var txt = document.createElement("U"); 
                var t = document.createTextNode("An underlined text."); 
                txt.appendChild(t); 
                document.getElementById("p").appendChild(txt); 
            } 
        </script> 
    </body>  
</html>                     

Output:
Before click on the button:
underline
After click on the button:

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