function ExtStack () {
		var stack = new Array();
				
		this.push = function (fn) {
			if (stack.indexOf(fn)==-1)
				stack.push(fn);
		}
		
		this.callAll = function() {
			for (var i=0;i<stack.length;i++)
				stack[i].call();	
		}	
	}
	
	var stack = new ExtStack();
	Ext.onReady(function(){stack.callAll()});