JavaScript three ways to get DOM objects __javascript

1, getElementById ()

The getElementById () method returns a reference to the first object that has the specified ID.

<script type= "Text/javascript" >
function GetValue ()
  {
  var X=document.getelementbyid ("MyHeader")
  alert (x.innerhtml)
  }
</script>
 

 

2. getElementsByTagName ()

The getElementsByTagName () method returns a collection of objects with the specified label name.


<script type= "Text/javascript" >
function getelements ()
  {
  var x=document.getelementsbytagname (" Input ");
  alert (x.length);
  }
</script>
 

 

3, Getelementsbyname ()

The Getelementsbyname () method returns a collection of objects with the specified name


<script type= "Text/javascript" >
function getelements ()
  {
  var x=document.getelementsbyname (" Myinput ");
  alert (x.length);
  }
</script>