launch function on page load as well and button press?

oailon · 06-01-2010 8:18pm #1

Presently the code on my site will, once the main image is clicked, check the screen resolution and then open a website depending on the one that best fits the webpage created for its dimension e.g. 1024x768, 800x600... I placed that dimension checking code into a function and then made the image a button to call it, but before I did that the code would automatically run when the user loads the page and I would like to get that back.

How do I modify the code so that the resolution check and launching of the correct website happens on page load while also performing the same action if the main image is pressed on the page as now?

http://www.meta.projectmio.com/pop.html

Many thanks.

Giblet · 06-01-2010 8:29pm

There are a number of ways, the easiest would probably to have a script tag with the function being called inside it.

<script> function(); </script>

Providing the function is within scope

oailon · 06-01-2010 8:48pm

Many thanks for your prompt reply, I tried that but I obviously didn't do it right. The code on my site is very small so I'll paste it here if that's okay:

Here is your idea:

<script> dimension_test(); </script>

Then I have the image which is a button:

<div align="center">
<img src="http://www.meta.projectmio.com/imagery/meta_popup.png" onclick= "dimension_test()" />
</div>

Then this code places the popup in the middle top of the users screen and defines the windows characteristics:

<script>
function PopupCenter(pageURL, title,w,h) {
var left = (screen.width/2)-(w/2);
var targetWin = window.open (pageURL, title, 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=no, copyhistory=no, width='+w+', height='+h+', top='+top+', left='+left);
}

Finally is the function which checks the screen dimensions and lanches the appropriate page:

function dimension_test() {
var width = screen.width;var res =(((!(640-width))*1)+((!(800-width))*2)+((!(1024-width))*3)+((!(1152-width))*4)+((!(1280-width))*5)+((!(1600-width))*6)); 
if(!(res)) res = 1;if (res=='1') {window.location='http://www.640.com/640_480.html'}
if (res=='2') {window.location='http://www.86.com/800_600.html'}
if (res=='3') {window.location='http://www.1024+.com/1024_768.html'}
if (res!='1' && res!='2' && res!='3') PopupCenter ('http://www.meta.projectmio.com/800.html','MyWindow',800,531)
}
</script>

Before (without the image being a button that called the function) the page would automatically behave as I needed, but Safari will not blindly launch popups so I thought that turning the page into a button which would demand it would work, it does, but at the expense of the automation on page load.

So I need to fix that, but I could not get your suggestion to work.

Many thanks.

oailon · 06-01-2010 8:58pm

Ah, I called the function with an onload event:

<BODY onLoad="dimension_test()">

It works now

Thanks for your help though!

launch function on page load as well and button press?

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