getComputedStyle throwing error in all browsers

[cloudsteph]

Error reporting in FF2, IE7, IE6, Safari 4. Not using the curCSS function at present in my webpages so unsure if it is affecting the function itself but it does cause error pop-ups to appear in IE6 while preventing code from validating in all browsers.

Error details reported in Firebug while running JQuery 1.2.2 [uncompressed version]:

uncaught exception: [Exception... "Could not convert JavaScript argument" nsresult: "0x80570009 (NS_ERROR_XPC_BAD_CONVERT_JS)" location: "JS frame ::  file:///Y:/IGS/Programming/Site/www/templates/js/jquery-122min.js :: anonymous :: line 22" data: no]

Line 0

Not sure if  http://dev.jquery.com/ticket/1779 or  http://dev.jquery.com/ticket/1661 are related as I've tried applying fixes for both to this issue without success.

[cloudsteph]

This error is now also appearing in 1.2.3.

uncaught exception: [Exception... "Could not convert JavaScript argument" nsresult: "0x80570009 (NS_ERROR_XPC_BAD_CONVERT_JS)" location: "JS frame ::  file:///Y:/IGS/Programming/Site/www/templates/js/jquery-1.2.3.js :: anonymous :: line 876" data: no]

Line 0

[davidserduke]

Do you have a simple test case that causes it? I've never seen this happen myself.

[cloudsteph]

I've put a version here:  http://www.boxatricks.com/jquery_bug/template-membership.htm

[davidserduke]

Testing in IE this bug is in your code in your init() function.

function init(){
 var divArray = new Array("detail_1", "detail_2", "detail_3", "detail_4","hide_1","hide_2","hide_3","hide_4");

 for(i=0;i<=8;i++){
   var theElement = document.getElementById(divArray[i]);
   $(theElement).hide();
 }
}

If you look you'll see your array has 8 elements but your loop goes from 0 to 8 inclusive. So what happens on the last loop is the getElementById returns null and $(null) == $(document) so it is trying to hide the document element itself which fails since it has no 'style' property.

Try changing your code to "< 8" instead of "<= 8" or probably better "< divArray.length".

[cloudsteph]

Thanks, I really appreciate your help. Still very much the JS novice.

Replying to davidserduke:

Testing in IE this bug is in your code in your init() function.

function init(){
 var divArray = new Array("detail_1", "detail_2", "detail_3", "detail_4","hide_1","hide_2","hide_3","hide_4");

 for(i=0;i<=8;i++){
   var theElement = document.getElementById(divArray[i]);
   $(theElement).hide();
 }
}

If you look you'll see your array has 8 elements but your loop goes from 0 to 8 inclusive. So what happens on the last loop is the getElementById returns null and $(null) == $(document) so it is trying to hide the document element itself which fails since it has no 'style' property.

Try changing your code to "< 8" instead of "<= 8" or probably better "< divArray.length".

[davidserduke]

Quite welcome. Glad your problem was fixed.