Internet Explorer dies trying to load javascript array on initialisation?

Question

in my javascript I load up an array based upon the HTML which has already produced. In Firefox this works perfectly, but in Internet Explorer 7 the page hangs for approximately several minutes.

I can't see why it takes so long to do something Firefox has no problem with?

ImageHTMLContainer just acts like a dictionary storing inner html.

var ImageHTMLContainer = [];

addLoadEvent(init);

function init() {

    var NumOfRows = parseInt(DID("NumRows").innerHTML);
    var NumOfCols = parseInt(DID("NumCols").innerHTML);
    var i;
    var j;

    for (i = 0; i < NumOfRows; i++) {
        ImageHTMLContainer["Row" + i.toString()] = DID("Row" + i).innerHTML;
        for (j = 0; j < NumOfCols; j++) {
            ImageHTMLContainer["Row" + i.toString() + "Col" + j.toString()] = DID("Row" + i + "Col" + j).innerHTML;
        }
    }
}

There are 400 rows (although this can vary) and 39 columns (eeek) — Tom
– Tom, Commented Mar 15, 2011 at 15:19

Martin Jespersen · Accepted Answer · 2011-03-15 15:15:55Z

1

ie7's js engine is a lot older and slower than the one in firefox.

You have a loop within a loop that reads innerHTML - don't do that, it is probably the very least efficient way you can do what you are doing.

Have you considered loading your data via xml or json instead of initializing your javascript data via the rendered DOM?

answered Mar 15, 2011 at 15:15

Martin Jespersen

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1 Comment

Tom Over a year ago

Could you elaborate on this? A table is being produced from SQL and i'm loading the inner html into JS to enable sorting. I load the data into JS because there are columns containing images etc, so its easier just to swap the inner html of the rows when re-sorting.

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