Correct way to clear contents of an Array in JavaScript

JavaScript

var 
    // creating an array
    myArray = ["lorem", "ipsum", "dolor", "sit", "amet"],
    
     // creating a variable that refers to the previous array.
    referenceToMyArray = myArray;

// Printing contents of original arrays.
document.write("Original Array: [" + myArray.join(", ") + "]");
document.write("<br />Reference Variable: [" + referenceToMyArray.join(", ") + "]");

// Clearing the original array
document.write("<br />["+myArray.splice(0, myArray.length).join(", ")+"]");

// Checking the contents of the reference array and original array;
document.write("<br />&nbsp;<br />Cleared Original Array: [" + myArray.join(", ") + "]");
document.write("<br />Affected Reference Variable: [" + referenceToMyArray.join(", ") + "]");