Arrays are used to organize a set of variables.

you could give every name its own variable. But it is easier to use arrays.

you tell x=New Array()...then give every name its own number starting with 0

x[0]="Alexander";
x[1]="Beatrice"; and so on.

OK, it looks like a bit more typing is involved here, but there are some advantages.

• You don't have to think of separate names for each value.
• It is now easier to track down and reference the values.

new Array prepares a section of cells. The number of cells is given with in brackets. So the example is creating a section of 10 cells called named x.

The next step is filling in the values for the x array. JavaScript is very literal. It likes to start counting at 0. So entering the values for the array must start at the 0 mark. And so forth down the array until all the cells are filled.

Now give it a action. Have the visitor enter a number and then have it print out the name that belongs to it. 

 

<SCRIPT TYPE="text/javascript"><!--
var GetNumber=prompt("Enter a number between 1 and 10","");
var TrueNumber= GetNumber -1;
document.write(x[TrueNumber]);
// -->
</Script>

 

• A PROMPT box appears asking for a number between 1 and 10. This number is placed in a cell named GetNumber. (If any other number is entered, the result states undefined).
• A cell called TrueNumber holds the value of GetNumber minus 1. Again, this is to get the correct cell reference as JavaScript starts counting at 0.
• The WRITE command then prints out the value for the stated array number.

 

click and see script in action

 

Second example:

I searched around and finally found a good use for a javascript with the array of images. I don't like the form buttons, but all in all I think this is a pretty effect:

                                                                    

                                                                           click and see script in action

 

 

index