Hello,
Try with below code snippet.
<script type=
"text/javascript"
>
var
popUp;
function
PopUpShowing(sender, eventArgs) {
var
myWidth = 0, myHeight = 0;
if
(
typeof
(window.innerWidth) ==
'number'
) {
//Non-IE
myWidth = window.innerWidth;
myHeight = window.innerHeight;
}
else
if
(document.documentElement && (document.documentElement.clientWidth || document.documentElement.clientHeight)) {
//IE 6+ in 'standards compliant mode'
myWidth = document.documentElement.clientWidth;
myHeight = document.documentElement.clientHeight;
}
else
if
(document.body && (document.body.clientWidth || document.body.clientHeight)) {
//IE 4 compatible
myWidth = document.body.clientWidth;
myHeight = document.body.clientHeight;
}
popUp = eventArgs.get_popUp();
var
gridWidth = myWidth;
var
gridHeight = myHeight;
var
popUpWidth = popUp.style.width.substr(0, popUp.style.width.indexOf(
"px"
));
var
popUpHeight = popUp.style.height.substr(0, popUp.style.height.indexOf(
"px"
));
popUp.style.left = ((gridWidth - popUpWidth) / 2) +
"px"
;
popUp.style.top = ((gridHeight - popUpHeight) / 2) +
"px"
;
}
</script>
Let me know if any concern.
Thanks,
Jayesh Goyani