Ideas on making a javascript object name unique in ASP.Net?

function MyObject( options )
{
  this.x = options.x;
}

MyObject.prototype.someFunction=function someFunctionF()
{
  return this.x + 1;
}

var opts = { x: 99 };

var myObject = new MyObject( opts );

function MyObject(options) { this.x = options.x; }
MyObject.prototype.someFunction = function() { return this.x + 1; }
MyObject.create(id, options) {
    if (!this._instances) this._instances = {};
    return this._instances[id] = new MyObject(options);
}
MyObject.getInstance(id) { return this._instances[id]; }

MyObject.create(ClientID, {x: 99});

String.Format("onclick="MyObject.getInstance('{0}').someFunction()", ClientID);

function MyObject( options ) { MyObject.x = options.x; }
MyObject.x = 99; // static
MyObject.prototype.someFunction = function () { return MyObject.x + 1; }