javascript if condition manipulation
===

I need some help with my JS logic here.
So basically I am getting a bunch of permissions and storing them as follows:

    for( var i=0 ; i<permissions.length ; i++ ) {
    	p[permissions[i].PERMISSION] = true;
    }

The values of the permissions are as follows

p.SELECT_USER,

p.INSERT_USER,

p.UPDATE_USER, etc and so on


Now I want to display/hide a window  based on the value of permissions.
I need some logic help in my if condition
So basically I want something like,

    if( 'permissions beigns with the word SELECT' && 'permissions does not begin with any other word' ) {
    	this.window.hide()
    } else {
    	this.window.show()
    }

is there any efficient way I cant do this by modifying my for loop? 