Add value to 'style.width' attribute

[bugboy]

Hi, I'm trying to add a number to the width of an element but the width value doesn't seem to be numeric even after i remove the "px" from it.

How can i add to an existing width? Below is my stab at it but i get 200200px instead of 400px.

Thanks!

<?php
echo'<div id="element"  style="width:200px;">';
$w = 200;
echo'<script type="text/javascript"> 
	var w = document.getElementById("element").style.width;
	w = w.replace(/px/, "");
	w = w + '.$w.'+ "px";
	document.getElementById("element").style.width = w;
</script>';
?>

[acoder]

Use parseInt() to get the integer value.

In this case, why not use PHP to set the width directly instead of using JavaScript?

[bugboy]

Thanks, That's what i'm looking for!

I'm changing the width of a container that holds several divs arranged like colunms. I'm adding additional div's/columns to the container with ajax while trying to keep them horizontally aligned, so, the container needs to expand to fit them in otherwise they will be offset vertically.

Here's my thinking.. If i were to update the entire container from the server then i would have to also update all of it's contents which could be 300kb+. By just adding the new content and then adjusting the container client side it saves resending the data for the existing content from the server every time i add a new div to the container. I suppose i could hold the content client side and re render it.. but it seems simpler to just adjust the container width with js.

Am i right to do it this way?

Thanks again.

bugboy

[acoder]

I based my observation on the code you posted:

<?php
echo'<div id="element"  style="width:200px;">';
$w = 200;
echo'<script type="text/javascript"> 
	var w = document.getElementById("element").style.width;
	w = w.replace(/px/, "");
	w = w + '.$w.'+ "px";
	document.getElementById("element").style.width = w;
</script>';
?>

which could simply be replaced with:

echo '<div id="element"  style="width:400px;">';

[hsriat]

echo'<div id="element"  style="width:', (200 + $w) , 'px;">';