where should I place the javascript function definations?

blackhorse

We used to be able to put the javascript function definations in the

But when I try to put a large block of javascript codes right after <head> before meta, link, style tags like the below

It makes the page revisit the server again. (when I use the php code to record the click, one click to this page record two clicks)

But if I put the javascript block after meta, link, style tags, it is fine. It will not revisit the server. What is the rule here about where to place the javascript block?

Thanks!

blackhorse

Now I pinpoint the problem.

The large javascript block has to be placed after this meta tag

But why?

It is an javascript issue but a php programming issue. Becasue, revisit a page doesn't cause any problems for client side issue but for the server side, it could cause duplicated orders, stats all the troubles.

I googled, cannot find the same incidents. Many other php programmers must already run into this issue before. Strange no posts regarding this I can find.

Anyone have advices and information regarding why this happening?

Thanks!

JPnyc

There is no rule. JS can go anywhere in the doc, head or body.

blackhorse

I tested again. Looks like large javacsript block has to be placed after meta tags.

Otherwise, when I use firefox (internet explorer is fine), the browser may try to display the page before the download finished. If javascript was placed before the meta tag, it seems firefox read this page twice.

My guess is that firefox default set up as display while downloading, internet explorer set up as display after full download.

But I cannot explain why javascript put before meta tags caused the browser visist the page twice.

Any one has the same issue?