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Upgrade Web Application support from IE8 to IE9

I got a task to investigate the IE 9 issue if we upgrade the system to from IE8. It's kinds of frustrated during the period. In the end, I am pretty happy I finished it.

IE 8 user the Quirks mode which  means not standard with the

IE 9 by default still using quirks mode, however, IE10 will use standard mode by default. So, it's good we test IE 9 in standard mode now to avoid the future issue with IE10.

Blog the knowledge for the reference of future project.

IE  8 vs IE 9(standard mode)
#1  createElement  method
IE 8 : will  support  the format like : .createElement("<span id='xx'>abc</span>");
IE 9 : you can only do with steps.  
        createElement("span"); .setAttribute("id","xx");

#2 getElementById method
<div name=”nameOfDiv”>

In standards mode (IE9) the below code will not work anymore.

document.getElementById(“nameOfDiv”)  --- This will return null in IE9

 Too fix this, need to explicit define the id value.

<div name=”nameOfDiv” id=”nameOfDiv”>


#3 document.all.framename.src
 <iframe style="display: none; width: 100%;" scrolling="no" name="framename"  id="framename"/>

IE 8:  value will be the related path /../foldername
ie 9:  will be the all url, e.g.


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