Reply to: Odd jscript problem

[xoggoth]

PICNIC - Wiktionary

Yeh. I'm an incompetent old fart.

[xoggoth]

Could you possibly have additional elements using the same ID name on the DOM at the time?

Don't think so. Think it's all solved now as I said. Initially I used a single box to show tips and details for pins/tracks. Then modified the box to include images relating to pins forgetting I'd used it for the tips.

Names can be a problem. Once lazily used names x and y for position in some interactive games, only for them to stop working in Chrome when Google added undocumented properties x and y.

[CynicalBroccoli]

Could you possibly have additional elements using the same ID name on the DOM at the time?

[ladymuck]

Eh??

PICNIC - Wiktionary

[xoggoth]

PICNIC

Eh??

[mudskipper]

Bah. Elsewhere in a tool tip function I was setting innerHTML of the container div to "". Sometimes after refresh I would move the mouse over the tool and trigger it.

PICNIC

[xoggoth]

IDIOT!

Bah. Elsewhere in a tool tip function I was setting innerHTML of the container div to "". Sometimes after refresh I would move the mouse over the tool and trigger it.

[xoggoth]

Cheers eek have a go at that when I 've fixed me curtain rods. Ever had a clue why just one element should not exist and only sometimes? Evil spirits!

Edit
Ah. No didn't fix it but ta anyway eek.

[eek]

I've had this a few times recently on one of my Amazon bots (everything is there when you look at the html but it doesn't exist).



To fix it I've taken to using document.getElementsByClassName("info")[0].innerHTML=""; to fix it with and using the classNames of the element which means your div will need to be

<div id="info" class="info"></div>

equally though a better approach would be

var info=document.getElementById("info");
if (info===null){
info=document.getElementsByClassName("info")[0];
}
if (info!==null){
info.innerHTML="";
}

[xoggoth]

An alert at top of script shows correct innerHTML content every time I refresh the page. Then the property is null when I try and use it in mouseover.

[mudskipper]

got a link to the page?

[xoggoth]

Ah! Nostrils! Neither defer nor moving the script to bottom of page has worked. Must be some odd fault somewhere. Thanks anyway.

[xoggoth]

Great, not heard of defer. Thanks.

[Hobosapien]

Maybe I should put all the jscript at end not start of page?

Yep, put script at the bottom of the page so the html will be loaded first, or use 'defer' for external scripts being linked to:

javascript - Is it necessary to put scripts at the bottom of a page when using the "defer" attribute? - Stack Overflow

[cannon999]

It is very likely that you are setting up this property through script before even it becomes visible to the script. Could it be the case? Make sure <div id="info"></div> exists before the script is run.

This is your answer.