text: window.ewaBackgrounds = {
  	staticPath: window.EWA && EWA.RV_STATIC_PATH ? EWA.RV_STATIC_PATH : "/EmpScriptV2",
  	backgrounds: [
  		"/backgrounds/Ubuntu/15266165381.jpg",
  		"/backgrounds/Ubuntu/152661648622.jpg",
  		"/backgrounds/Ubuntu/152661650382.jpg",
  		"/backgrounds/Ubuntu/152661651342.jpg",
  		"/backgrounds/Ubuntu/1526616480990.jpg",
  		"/backgrounds/Ubuntu/1526616491790.jpg",
  		"/backgrounds/Ubuntu/1526616497815.jpg",
  		"/backgrounds/Ubuntu/1526616508896.jpg",
  		"/backgrounds/Ubuntu/1526616517697.jpg",
  		"/backgrounds/Ubuntu/1526616521273.jpg",
  		"/backgrounds/Ubuntu/1526616526796.jpg",
  		"/backgrounds/Ubuntu/1526616530254.jpg",
  		"/backgrounds/Ubuntu/1526616534901.jpg",
  		"/backgrounds/Ubuntu/1526616541182.jpg"
  	],
  
  	setBgRandom(refData) {
  		let data = refData || this.backgrounds;
  		let m = data.length;
  		let r = Math.round(Math.random() * 1000);
  		let v = r < m ? r : r % m;
  		let s = data[v];
  		this.setCss(s);
  	}
  	,
  	setBg() {
  		let s = window.localStorage["BG"];
  		if (s == null) {
  			this.setBgRandom(this.backgrounds);
  			return;
  		}
  		this.setCss(s);
  	},
  	setCss(s) {
  		let url = this.staticPath + s.replace(".200x150.jpg", "");
  		if (url.endsWith(",1")) { // 平铺
  			url = url.replace(",1", "");
  			let css = {
  				"background-repeat": "repeat",
  				"background-size": "auto",
  				'background-image': 'url(' + url + ')'
  			};
  			$('body').css(css);
  		} else {
  			let css = {
  				"background-repeat": "no-repeat",
  				"background-size": "cover",
  				'background-image': 'url(' + url + ')'
  			};
  			$('body').css(css);
  		}
  	}
  };