Maths Using Randomly Selected Symbols?

May 12, 2010

I am randomly selecting the maths symbol (+,-,*,/) using a math.random and then applying the relevant symbol to a variable based on the result, ie if result == 1 then symbolGen = "+"

I now need to use this symbol in the Javascript for it's original purpose, as I have two other numbers being generated and need to work out the answer.

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Wall Of Randomly Selected Images

Jul 14, 2010

I'm aiming for a page filled with a stack of images (about 20) - each pulled at random from a set of hundreds, ideally but not necessarily without repetition.There are heaps of threads discussing rotating individual images at random but I can't find any referencing a whole wall of images. The plan is for the arrangement to be determined only by the width of the browser so there really doesn't need to be any design to the page - just a long line of pictures, without gaps, wrapped.

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Script To Put Info For Randomly Selected Banners

Mar 9, 2009

I found the following script for random banner ads at [URL]. It is almost what I want, except it only appears to work once, and then no more. I suspect it has something to do with the "today" functions near the end, but being a complete novice, have no idea what to do to make it work every time I refresh.

Here's the script:
<SCRIPT>
<!-- written by The Omega
// [URL]
// the_omega@geocities.com
// You must leave these comments in to use the script
// (hey, I wrote it. Let me have a little credit!)

// put info for randomly selected banners here, as in the examples
gfx0="banner1.gif";
lnk0="page1.html";
alt0="Alt code 1";
txt0="Tagline 1";
gfx1="banner2.gif";

lnk1="page2.html";
alt1="Alt code 2";
txt1="Tagline 2";
gfx2="banner3.gif";
lnk2="page3.html";
alt2="Alt code 3";
txt2="Tagline 3";
len=3; // change to equal number of banners

today=new Date();
today=today.getTime()/10;
rnd=today%len;
document.writeln('<A HREF="'+eval("lnk"+rnd)+'"><IMG SRC="'+eval("gfx"+rnd)+'" ALT="'+eval("alt"+rnd)+'"><BR>'+eval("txt"+rnd)+'</A>');

//-->
</SCRIPT>
<p align="center"><font face="arial" size="-2">This free script provided by</font><br>
<font face="arial, helvetica" size="-2"><a href="[URL]">JavaScript
Kit</a></font></p>

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Click Event That Replaces An Image On Page With A New Image That Has Been Selected Randomly From An Array

Aug 29, 2010

Im trying to have a click event that replaces an image on the page with a new image that has been selected randomly from an array. I have solved PART of this already (can get the random image to appear).

However, instead of appearing on the page where the old image was, the new image appears in a blank page.

My research indicates that thisblank page location-problem is a result of using document.write in the Function. Therefore, I know I need to find a different way to accomplish this, but am failing miserably.

I have been trying for hours and hours and HOURS to figure out proper syntax for accomplishing this via elements, functions, variables and mootools.

A bit of my research:

I found this---but havent figured out how to implement it in my scenario:

I found this---but havent figured out how to implement it in my scenario:

Code:

Source: [url]

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Maths Game

Oct 3, 2003

Have a look at this maths game I made. It tests you on adding, subtracting, multiplying and dividing and has three different levels.

Note-you must save the code below as mathsgamefinal.htm for the reset button to work.


<html>



<head>

<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">

<meta http-equiv="Content-Language" content="en-gb">

<title></title>

</head>



<body bgcolor="#FF0000">



<script type="text/javascript">



function next1(){

var outof=document.getElementById('outof').value;

if(document.getElementById('next').value=="Next" && document.getElementById('type').value=="a"){document.getElementById('next').value='Enter' add(); document.getElementById('answer').value='answer'}
else if(document.getElementById('next').value=="Next" && document.getElementById('type').value=="m"){document.getElementById('next').value='Enter' times(); document.getElementById('answer').value='answer'}
else if(document.getElementById('next').value=="Next" && document.getElementById('type').value=="t"){document.getElementById('next').value='Enter' minus(); document.getElementById('answer').value='answer'}
else if(document.getElementById('next').value=="Next" && document.getElementById('type').value=="d"){document.getElementById('next').value='Enter' divide(); document.getElementById('answer').value='answer'}

else if(document.getElementById('next').value=="Enter" && document.getElementById('answer').value==(cr)){ document.getElementById('question').value='Correct' document.getElementById('next').value='Next' document.getElementById('outof').value=parseInt(document.getElementById('outof').value)+1; document.getElementById('score').value=parseInt(document.getElementById('score').value)+1; pc();}

else{ document.getElementById('question').value='Wrong. Answer= '+cr; document.getElementById('next').value='Next' document.getElementById('outof').value=parseInt(document.getElementById('outof').value)+1; pc();}

document.getElementById('answer').select();
}



function add(){
ea1=(Math.floor(Math.random() * (1 - 10)) + 10);
ea2=(Math.floor(Math.random() * (1 - 10)) + 10);
ma1=(Math.floor(Math.random() * (21 - 49)) + 49);
ma2=(Math.floor(Math.random() * (21 - 49)) + 49);
ha1=(Math.floor(Math.random() * (111 - 299)) + 299);
ha2=(Math.floor(Math.random() * (111 - 299)) + 299);

if(document.getElementById('level').value=="e"){document.getElementById('question').value=ea1+' plus '+ea2; cr=ea1+ea2}
if(document.getElementById('level').value=="m"){document.getElementById('question').value=ma1+' plus '+ma2; cr=ma1+ma2}
if(document.getElementById('level').value=="h"){document.getElementById('question').value=ha1+' plus '+ha2; cr=ha1+ha2}
}
function times(){
em1=(Math.floor(Math.random() * (2 - 10)) + 10);
em2=(Math.floor(Math.random() * (2 - 10)) + 10);
mm1=(Math.floor(Math.random() * (11 - 19)) + 19);
mm2=(Math.floor(Math.random() * (6 - 12)) + 12);
hm1=(Math.floor(Math.random() * (21 - 29)) + 29);
hm2=(Math.floor(Math.random() * (21 - 29)) + 29);

if(document.getElementById('level').value=="e"){document.getElementById('question').value=em1+' times '+em2; cr=em1*em2}
if(document.getElementById('level').value=="m"){document.getElementById('question').value=mm1+' times '+mm2; cr=mm1*mm2}
if(document.getElementById('level').value=="h"){document.getElementById('question').value=hm1+' times '+hm2; cr=hm1*hm2}


}

function minus(){
et1=(Math.floor(Math.random() * (10 - 20)) + 20);
et2=(Math.floor(Math.random() * (1 - 10)) + 10);
mt1=(Math.floor(Math.random() * (50 - 99)) + 99);
mt2=(Math.floor(Math.random() * (20 - 50)) + 50);
ht1=(Math.floor(Math.random() * (350 - 1000)) + 1000);
ht2=(Math.floor(Math.random() * (350 - 1000)) + 1000);

if(document.getElementById('level').value=="e"){document.getElementById('question').value=et1+' minus '+et2; cr=et1-et2}
if(document.getElementById('level').value=="m"){document.getElementById('question').value=mt1+' minus '+mt2; cr=mt1-mt2}
if(document.getElementById('level').value=="h"){document.getElementById('question').value=ht1+' minus '+ht2; cr=ht1-ht2}


}
function divide(){
ed1=(Math.floor(Math.random() * (2 - 10)) + 10);
ed2=(Math.floor(Math.random() * (2 - 10)) + 10);
md1=(Math.floor(Math.random() * (11 - 19)) + 19);
md2=(Math.floor(Math.random() * (11 - 19)) + 19);
hd1=(Math.floor(Math.random() * (21 - 29)) + 29);
hd2=(Math.floor(Math.random() * (21 - 29)) + 29);
ed3=ed1*ed2;
md3=md1*md2;
hd3=hd1*hd2;

if(document.getElementById('level').value=="e"){document.getElementById('question').value=ed3+' divided by '+ed2; cr=ed1}
if(document.getElementById('level').value=="m"){document.getElementById('question').value=md3+' divided by '+md2; cr=md1}
if(document.getElementById('level').value=="h"){document.getElementById('question').value=hd3+' divided by '+hd2; cr=hd1}
}


function answerreset(){
if(document.getElementById('answer').value=="answer"){document.getElementById('answer').value=''}
}

function pc(){
document.getElementById('scorepercent').value=document.getElementById('score').value/document.getElementById('outof').value*100;
document.getElementById('scorepercent').value=Math.round(document.getElementById('scorepercent').val ue);
}
</script>

<table border="0" width="198" height="180" bordercolor="#000000" style="background-color: #FFFF00; border-style: solid">

<tr>

<td height="33" width="99" colspan="2">

<p align="center">

<select size="1" name="type" id='type'>

<option value="a" selected>Add</option>

<option value="t">Take away</option>

<option value="m">Multiply</option>

<option value="d">Divide</option>

</select></p>

</td>

<td height="36" width="99" colspan="2">

<p align="center">

<select size="1" name="level" id=level>

<option value="e" selected>Easy</option>

<option value="m">Medium</option>

<option value="h">Hard</option>

</select></p>

</td>

</tr>

<tr>

<td height="36" width="198" colspan="4">

<p align="left">

<input type="button" name="T1" id='question' value="Click next to begin" style="background-color: #FFFF00; border: 0 solid #FFFF00">

</p>

</td>

</tr>

<tr>

<td height="33" width="66">

<p align="center"><input type="text" name="answer" size="6" id='answer' onclick=answerreset()></td>

<td height="36" width="66" colspan="2">

<p align="center"><button onclick='next1()' id='next'>Next</button></td>

<td height="33" width="66">

<p align="center"><button onclick='window.location="mathsgamefinal.htm"'>Reset</button></td>

</tr>

<tr>

<td height="36" width="66">

<p align="center">Score %:</td>

<td height="33" width="66" colspan="2">

<p align="center">Score Marks:</td>

<td height="33" width="66">

<p align="center">Out of:</td>

</tr>

<tr>

<td height="33" width="66">

<p align="center"><input type="button" name="T1" size="3" id=scorepercent value="0"></td>

<td height="33" width="66" colspan="2">

<p align="center"><input type="button" name="score" size="3" id=score value="0"></td>

<td height="36" width="66">

<p align="center"><input type="button" name="outof" size="3" id=outof value="0"></td>

</tr>
</table>
</body>
</html>



Any feedback would be much apprieciated...

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