xxx.js

getClientVersions:function(){
		
		
		if( this.isInJuhuasuanAPP() ){
			var ua = navigator.userAgent;
			var regs = [/\@juhuasuan_iphone_(\d\.\d)/, /AliApp\(JU\/(\d\.\d)/];
		
			var arr = null;//ua.match( v2d5 );
			var i =0;
			while( (arr == null || arr[1] == undefined) && regs.length > i){
				arr = ua.match(regs[i]);
				i++;
				if(arr && arr[1]){
					return parseFloat(arr[1]);
				}
			}
			
			// android 2.5 没有 ua 信息
			return 2.4;
		}
		
		
		return null;
		
	},
	
	
	
	
	isInJuhuasuanAPP:function(){
		var ua = navigator.userAgent;
		// ios 2.5 , ios 2.6 andriod 2.6 
		var is = ua.indexOf("@juhuasuan_iphone") != -1 || ua.indexOf("AliApp(JU/") != -1;
		
		// android 2.5
		if( !is ){
			if( this.isInAndroidSystem() && ua.indexOf('WindVane/2.7.0') != -1){
				is = true;
			}
		}
		
		return is;
		
	},
	
	
	
	isInIOSSystem:function(){
		var ua = navigator.userAgent;
		return ua.indexOf("iPhone") != -1 || ua.indexOf("iPad") != -1;
	},
	isInAndroidSystem:function(){
		return navigator.userAgent.indexOf("Android ") != -1;
			
	},