Javascript Working With IE But Not Netscape

[evil_bastard]

Can anyone explain why the following script works in IE but not
Netscape?

function changeSlide() {
if (form1.pic1.src.indexOf("diane.jpg") != -1) {
form1.pic1.src = "http://home.comcast.net/~llabbauf/public_html/graphics/tdub.gif";
} else if (form1.pic1.src.indexOf("tdub.gif") != -1) {
form1.pic1.src = "http://home.comcast.net/~llabbauf/public_html/graphics/thug.jpg";
} else if (form1.pic1.src.indexOf("thug.jpg") != -1) {
form1.pic1.src = "http://home.comcast.net/~llabbauf/public_html/graphics/diane.jpg";
}
}

function runSlideShow() {
setInterval("changeSlide()", 1000);
}
</script>

<form name="form1">
<img src="http://home.comcast.net/~llabbauf/public_html/graphics/diane.jpg"
name="pic1">
</form>

When viewed in IE it accurately changes the images, but Netscape just
loads the first image and then does nothing.

Les

[Lasse Reichstein Nielsen]

ll******@state.pa.us (evil_bastard) writes:

Can anyone explain why the following script works in IE but not
Netscape?
Yes. (Ok, can I stop here? :)
function changeSlide() {
if (form1.pic1.src.indexOf("diane.jpg") != -1) {

You have not declared the variable "form1".
IE automatically declares global variables for named elements, other
browsers doesn't.

Use
var form1 = document.forms['form1'];

/L
--
Lasse Reichstein Nielsen - lr*@hotpop.com
DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleDOM.html>
'Faith without judgement merely degrades the spirit divine.'

[Richard Cornford]

evil_bastard wrote:

Can anyone explain why the following script works in
IE but not Netscape?

function changeSlide() {
if (form1.pic1.src.indexOf("diane.jpg") != -1) {

<snip>

There is no reason to expect "form1" to be a global variable (property
of the global object) that refers to the FORM element or for the IMG
element with the name "pic1" to be a named property of that form object.
On IE they are but other browsers do not provide nearly as many
shortcuts as IE does so all of the IE shortcuts are best avoided for
cross-browser work.

Richard.

[Les Labbauf]

Thanks for the reply. The coworker who provided me with the script
language in the first place just helped me debug it and we came to the
same conclusion.
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