How to change the Document Mode in Internet Explorer to Standards value by using visual force page coding ? I need it to display the page correctly in IE.
There is a docType attribute in
<apex:page> component you can set that to html-5.0
<apex:page docType="html-5.0" />
I think you'll find the answer on this question helpful, it involves setting the X-UA-Compatible header via Apex. IE10 Forced into IE7 Standards document mode for Visualforce
One alternative is always adding the metatag
<head> <title>The Page Title</title> <meta http-equiv="X-UA-Compatible" content="IE=8" /> </head>