changing javascript global variable inside function..

[kirkh34]

hello im trying to change a variable set outside of a function and calling the function with an onchange... i'm having problems getting the variable to change

 

 

 

 

<script type="text/javascript">


var price = Number('<?php echo $price; ?>');


function addtwo()
{

if(document.add.size.value == "2xl")
{

price = price + 2;
}
}

</script>

[mdgeus]

Why don't you parse the value with the onchange

 

onChange="addtwo('<?php echo $price; ?>');"

 

 

<script type="text/javascript">

 

function addtwo(p)

{

 

if(document.add.size.value == "2xl")

{

p = price;

price = price + 2;

}

}

 

Not tested it but I think that works better.

 

</script>

[.josh]

are you sure it's the variable? There's no reason the variable shouldn't be incremented.  I think the more likely problem is that the condition fails or the function fails to be called.  put an alert(price) into your function, outside of the condition.  If it fails to alert, your function is failing to be called.  If it does alert, put the alert inside your condition. If it fails to be called, your condition is failing.

 

 

 

 

[kirkh34]

okay the alert works... and it shows the incremented variable... but i guess i'm not displaying it right? here's my code

 

echo "<tr>";
echo "<td style='text-align:right;padding-right:10px;' id='certain'>Price:</td><td style='font-size:16px;padding-left:5px;color:#fff;'>$<script type='text/javascript'>document.write(price);</script></td>";
echo "</tr>";
echo "<tr>";
echo "<td style='text-align:right;padding-right:10px;' id='certain'>Size:</td>
<td style='padding-left:5px;'>
    <select class='size' name='size' onChange=\"addtwo();\">
        <option value='s'>S</option>
        <option value='m'>M</option>
        <option value='l' SELECTED>L</option>
        <option value='xl'>XL</option>
        <option value='2xl'>2XL (Add $2.00)</option>
    
    </select>
</td>";
echo "</tr>";  

[kirkh34]

i did notice... with this function ...everytime you onchange it adds 2... i would not like to have it continue to add over and over in case someone selects it over and over.... as you can see in the html there are various sizes and if "2xl" is selected i would like the price to display 2 dollars more than the original price and if switched back then the price goes back as well....i'm thinking maybe the function needs to be redone...any suggestions?

[haku]

Suggestion? Maybe learn to organize your thoughts into something understandable? It seems like you typed out your thoughts without actually looking at them to see if they mad sense to anyone else.

[kirkh34]

well haku let me explain my thoughts... what is it about my question that is not understandable? is it the part where i use php to echo out the html?... listen... i come onto these forums because there are intelligent people who like helping people who don't understand programming at your genius level yet... it's not like my situation is complicated....

 

... i have a simple select with sizes that if you look closely... the XL size needs to add $2.00 to the price when selected....this seems like it could be accomplished simply but I can't figure it out...which brings me to the forum

 

i'm not asking anyone to write me a whole new working function or anything...i came here for ADVICE...like "yeah you could try doing this or this..." and if it's something I don't understand yet I can look it up....i appreciate everyones responses that gave their time and i appreciate the ones who chose to waste my time to not post...

[haku]

My problem wasn't with your coding or level whatsoever, it was with the fact that I can't understand what you are saying in your posts. They are like a stream of thoughts without a filter.