define([],function(){// module:// dojo/throttle// summary:// This module provide a throttlerreturnfunction(cb,wait){// summary:// Create a function that will only execute once per `wait` periods.// description:// Create a function that will only execute once per `wait` periods// from last execution when called repeatedly. Useful for preventing excessive// calculations in rapidly firing events, such as window.resize, node.mousemove// and so on.// cb: Function// The callback to fire.// wait: Integer// time to delay before allowing cb to call again.varcanrun=true;returnfunction(){if(!canrun){return;}canrun=false;cb.apply(this,arguments);setTimeout(function(){canrun=true;},wait);};};});