JavaScript Note 08:javascript's if...else statement

The case code is as follows:

   <! DOCTYPE html>  MyFunction () { var  x=" "  var  time=new   Date (). getHours ();  if  (Time<20 = "Good Day"  else   {x  = "Good Evening" ; 
 document.getElementById ( "Demo"). Innerhtml=X;}  </script></body>  

var elem= document.getElementById ("demo"); get Element
elem.innerhtml = x; The HTML content of Elem becomes x, where x is the HTML content

This means inserting or replacing a elem HTML content, and once the innerHTML attribute is used, all its contents are replaced

：

Click "Click here" and the following results appear:

JavaScript Note 08:javascript's if...else statement