SharePoint get SearchCenter Result page in javascript

Hi ,

How to get SearchCenter Result Page url in javascript in SP2013. Is there any API?

I tried below code, but its not giving me my Search Center result page.

var context = new SP.ClientContext.get_current();
var web = context .get_site().get_rootWeb();
var props =  web.get_allProperties();
 
ctx.load(web);
 
ctx.executeQueryAsync(function () {
    //alert(props.get_item("SRCH_TRAGET_RESULTS_PAGE"));
 },
 function() {
 
});