Problem using onload javascript

Question

I have used Javascript onlaod like this:

function check()
{
   var pic =  new Image();
   pic.src= "images/first.jpg";
   pic.onload =  function()
   {
     alert("Uploaded");
   }
}

This is html code where the function is called.

<input type="button" onclick="check()" value="Check" />

It works for both safari and firefox. But with IE, first time it works but when I click on check Button next time it does not work. It also works when cache is cleared.

Can anyone help me what problem might occur here.

Thanks in advance

SamGoody · Accepted Answer · 2009-09-01 10:18:32Z

9

This should not be a problem in IE8.

IE6 (not sure about 7) is notoriously eager to use cached files, and when taking from the cache the load is not correctly calculated (I recall there being an interesting bug report on this, look for it on MS's site).

It can be solved by adding a [useless] parameter that forces a reload of the cached file:

pic.src= "images/first.jpg?nocache="+Math.random()

answered Sep 1, 2009 at 10:18

SamGoody

14.7k10 gold badges84 silver badges93 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Faiz Over a year ago

A random parameter will solve the caching issue. Your case looks like a caching issue only.

user75472 Over a year ago

Thank you so much samgoody and Faiz !!! Its just a cache problem. It's working now. Thanks again :)

ppuschmann · Accepted Answer · 2009-09-01 10:25:00Z

0

perhaps the onload() is too early?

jquery uses a function

$(document).ready(function(){}

that is executed when the page has finished loading. Perhaps you need some similar function.

answered Sep 1, 2009 at 10:25

ppuschmann

2552 silver badges10 bronze badges

1 Comment

scunliffe Over a year ago

OP is using the correct event handler, it is just IE aggressively caching and then not reporting a load event the 2nd-Nth times

Collectives™ on Stack Overflow

Problem using onload javascript

2 Answers 2

2 Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related