To disable back button of browser ... delete history
Put this javascript at the <head> tag
<script type="text/javascript">
function setFocus()
{
document.getElementById("contentPage").focus();
var URL;
var i;
var QryStrValue;
URL = window.location.href;
i = URL.indexOf("?");
QryStrValue = URL.substring(i + 1);
if (QryStrValue != 'X')
{
window.location = URL + "?X";
}
}
</Script>
Then call your function using onload event in <body> tag.
<body onload="setFocus()">
Here is the reference that I use:
http://www.daniweb.com/web-development/javascript-dhtml-ajax/threads/60682
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