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///- REQUIRE FN
// equivalent to require from node.js
function require(url){
    if (url.toLowerCase().substr(-3)!=='.js') url+='.js'; // to allow loading without js suffix;
    if (!require.cache) require.cache=[]; //init cache
    var exports=require.cache[url]; //get from cache
    if (!exports) { //not cached
            try {
                exports={};
                var X=new XMLHttpRequest();
                X.open("GET", url, 0); // sync
                X.send();
                if (X.status && X.status !== 200)  throw new Error(X.statusText);
                var source = X.responseText;
                // fix (if saved form for Chrome Dev Tools)
                if (source.substr(0,10)==="(function("){ 
                    var moduleStart = source.indexOf('{');
                    var moduleEnd = source.lastIndexOf('})');
                    var CDTcomment = source.indexOf('//@ ');
                    if (CDTcomment>-1 && CDTcomment<moduleStart+6) moduleStart = source.indexOf('\n',CDTcomment);
                    source = source.slice(moduleStart+1,moduleEnd-1); 
                } 
                // fix, add comment to show source on Chrome Dev Tools
                source="//@ sourceURL="+window.location.origin+url+"\n" + source;
                //------
                var module = { id: url, uri: url, exports:exports }; //according to node.js modules 
                var anonFn = new Function("require", "exports", "module", source); //create a Fn with module code, and 3 params: require, exports & module
                anonFn(require, exports, module); // call the Fn, Execute the module
                require.cache[url]  = exports = module.exports; //cache obj exported by module
            } catch (err) {
                throw new Error("Error loading module "+url+": "+err);
            }
    }
    return exports; //require returns object exported by module
}
///- END REQUIRE FN