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So, you need to set up an array with ten elements similar to the following example, in which each element is a random (and perhaps peculiar) quote that I have thrown into the mix for you:
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var quotes= new Array(10); quotes[0]="Look in the mirror Are you looking at me "; quotes[1]="It is time for a rhyme, I guess"; quotes[2]="Where is my JavaScript book "; quotes[3]="If I had a buck for every dollar I spent--Oops, never mind"; quotes[4]="I suppose you were expecting a real quote here"; quotes[5]="Quotes are great, but don't quote me on that"; quotes[6]="What should I write here "; quotes[7]="Wut hapns iff eye miss spel ohn purpas "; quotes[8]="Mark my words, I will mark my words"; quotes[9]="This spot reserved for a better quote";
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Now that you have this odd list of quotes in an array, you can use them by generating a random integer You need a random integer between 0 and 9 (ten numbers), so you can use the following code to assign a random integer between 0 and 9 to a variable:
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var rand_int = Mathfloor(Mathrandom()*10);
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Now the value of the variable rand_int will be a random integer between 0 and 9 You can use it to access the element of the array whose index number matches the random integer in the rand_int variable You just need to access the array element using the variable as the index number, as in the following example:
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quotes[rand_int]
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You can write this value in the body of the page in a documentwrite() statement, or you can reassign the innerHTML property of an element An example using innerHTML is provided next The HTML document is saved as random_quoteshtml and the JavaScript file is saved as random_quotesjs The HTML code:
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<body> <h1>My Random Quote for You:</h1> <div id="my_quote"> Look in the mirror Are you looking at me </div> <script type="text/javascript" src="random_quotesjs"></script> </body>
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The JavaScript code:
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var quotes= new Array(10); quotes[0]="Look in the mirror Are you looking at me "; quotes[1]="It is time for a rhyme, I guess";
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quotes[2]="Where is my JavaScript book "; quotes[3]="If I had a buck for every dollar I spent--Oops, never mind"; quotes[4]="I suppose you were expecting a real quote here"; quotes[5]="Quotes are great, but don't quote me on that"; quotes[6]="What should I write here "; quotes[7]="Wut hapns iff eye miss spel ohn purpas "; quotes[8]="Mark my words, I will mark my words"; quotes[9]="This spot reserved for a better quote"; var q_div = documentgetElementById("my_quote"); var rand_int = Mathfloor(Mathrandom()*10); q_divinnerHTML = quotes[rand_int];
The code writes one of the random quotes on the page based on the random integer value in the rand_int variable A default quote (the first one in the array data) is provided for those without JavaScript, which is then overwritten with the random quote if JavaScript is available Reloading the page enables the random number to be reset and will probably (though not necessarily, because it is random) show a different quote Figure 12-3 shows one of the possible results of this script when run in a browser Figure 12-4 shows another one of the possible results of this script when run in a browser You can keep getting different (or sometimes the same) results by refreshing the page Now that you can write random quotes into a page, how about displaying a random image It is very similar to the last script; you just need to make some small adjustments Random Images for the Updated Look A random-image script can give your page the feel of being updated without requiring you to change an image all the time Of course, the images all need to fit the content where you decide to place the randomly chosen image A randomimage script could be useful, for example, for an art gallery to display its collection
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