Control Hiding By Permission Based

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<script type="text/javascript" src="/_layouts/15/init.js"></script>
<script type="text/javascript" src="/_layouts/15/sp.runtime.js"></script>
<script type="text/javascript" src="/_layouts/15/sp.js"></script>
<script type="text/javascript" src="/_layouts/15/MicrosoftAjax.js"></script>
<script type="text/javascript">//<![CDATA[
var g_pageLoadAnimationParams = { elementSlideIn : "sideNavBox", elementSlideInPhase2 : "contentBox" };

$(document).ready(function(){
//disableControls();
checkUser();
});
var adminUsers;
var vCurrUserName;
var groupCollection;
var _group;

function checkUser() {

alert('username');
var currentContext = new SP.ClientContext.get_current();

//get current user

vCurrUserName = currentContext.get_web().get_currentUser();
alert(vCurrUserName);
currentContext.load(vCurrUserName);

// get Admin group

groupCollection = currentContext.get_web().get_siteGroups();
currentContext.load(groupCollection);

//var _group = groupCollection.getById(10); // ID of the Group

currentContext.executeQueryAsync(Function.createDelegate(this, this.checkUserSuccess),
Function.createDelegate(this, this.checkUserFailure));

}

var vIsAdmin = false;
function checkUserSuccess() {
var currentContext = new SP.ClientContext.get_current();

var grpEnum = groupCollection.getEnumerator();

while(grpEnum.moveNext()){
var grpItem = grpEnum.get_current();
currentContext.load(grpItem);
alert('Mohan');
// here you can add one more if condition to check for "Approvers" group.
alert(grpItem.get_title());
if(grpItem.get_title() == "Member"){
_group = grpItem;
break;
}
}

adminUsers = _group.get_users();
currentContext.load(adminUsers);

currentContext.executeQueryAsync(Function.createDelegate(this, this.findUserInGroup),
Function.createDelegate(this, this.checkUserFailure));
}

function findUserInGroup(){
var listEnumerator = adminUsers.getEnumerator();

while (listEnumerator.moveNext()) {

var item = listEnumerator.get_current();

//check current user login name and user login name from admin group

if (vCurrUserName.get_loginName() == item.get_loginName()) {

vIsAdmin = true;

break;

}

}

if (vIsAdmin) {
alert('Admin');
// do something here
}
else
{
alert('not Admin')
// do something here
}



}






//]]>
</script>