Why is this site so slow in IE6 and crashes?

My website crashes IE

• I have a website that sometimes crashes people's IE browsers. My site uses quite a bit of Javascript and I suspect that this is related to the problem. The crashes occur with several different versions of IE and like any good bug are not predictable (not always at the same place and not easily reproducible). Upgrading the browser is not an option since this website is used by many different people. Not using JS is also not an option. What I am hoping to do is "tune" my Javascript to avoid these problems. That is, change the parts that cause the crashes. What I would like is a big list of HTML and JS that crash IE and workarounds to avoid these crashes. A (made up) example might look like this: Resizing a DIV while the page is loading crashes IE5 20% of the time. Waiting for the page to load eliminates the crash.

• Answer:

  Hi beavis, First of all, let me start by saying that there is no such list available on net which can give you all the events which causes the IE to crash and their workarounds. I've tried to list many such cases by searcing the net. As a suggestion, if you ask your users to upgrade their browsers to IE 5, they can avoid most of the crashes. Here are some of the cases: 1. If you create an "is" object on IE3 for the Mac, the first time the page is loaded, the code will work fine, however any reloads of the page will cause the browser to crash Workaround :To get around this on IE3 for the Mac, we don't create an "is" object; instead, we create bunch of boolean variables which have similar names Another possible workaround is to use the object oriented code on all other browsers but wrap it in a check which avoids executing the object oriented code on IE3 for the Mac. This preserves the object oriented design of the code but requires an extra boolean check like if (!isIE3Mac && is_nav4up) each time you reference the is object. http://www.mozilla.org/docs/web-developer/sniffer/browser_type.html 2. Check out this page too. It has some HTML code which can crash your IE. So the workaround is do not code as given on this page: http://www.insecure.org/sploits/ie40.bugs.html 3. Microsoft Internet Explorer Can Be Crashed By Malicious 'location.replace' Javascript Solution: No solution was available at the time of this entry. But I think, in the latest version of IE, this has been fixed. http://securitytracker.com/alerts/2002/Mar/1003856.html 4. IE4 has a layout bug. You'll need to load your menus before the window's onLoad event handler is called, because IE4 will most often crash when the Menu component tries to use the JScript innerHTML property for CSS-P objects after the page is laid out, especially with multiple menus. Solution: Load your menus early and you should be fine. 5. Due to users installing IE4 final without uninstalling IE4 beta, an error is caused when clicking a link to open a pop-up window. Microsoft Internet Explorer 4 has errors with this line: popupWin = window.open("file.html", "remote"); Another weird twist to this case is that it doesn't always happen. Infact, many people report that the browser crashes after recieving the error "No such interface supported". Solution:The best solution is to uninstall the browser and reinstall just IE4 final. This will solve the problem and solve other undiscovered problems. 6. A page uses frames to host JavaScript code on the main page, and uses a "main" subframe to display rendered contents calculated by the JavaScript code. In addition, the displayed page has event handlers on various actions that could be cause for the page to be redrawn, by executing a function in the parent frame. So, if we use an "onChange" event handler in a text input box, and the user enters data and TABS out of the box, the onChange event handler is invoked. If the event handler redraws the page, IE will crash. Solution: If you change the data and then CLICK on the page, the event handler is also invoked, the page is redrawn, but the browser does not crash. http://security-archive.merton.ox.ac.uk/bugtraq-199909/0280.html 7. Various JavaScript bugs or events that can cause IE to crash can be found here: http://search.atomz.com/search/?sp-q=bugs+with+JS+to+crash+IE&sp-a=sp1001071c Search Terms used: tuning of javascript to avoid IE crashing ://www.google.com/search?q=tuning+of+javascript+to+avoid+IE+crashing&btnG=Google+Search&hl=en javascript events that can crash IE browser ://www.google.com/search?hl=en&q=javascript+events+that+can+crash+IE+browser&btnG=Google+Search how to avoid IE browser from crashing http://search.dogpile.com/texis/search?q=how+to+avoid+IE+browser+from+crashing&geo=no&fs=web I hope this will help you in making your code more robust and Crash-Free. Regards netcrazy