轮训业务逻辑

var channelArr = [1,2,3,4,5,6,7,8,9];
var windowArr = [1,2,3];
var time = 1;
//当逻辑通道数大于屏幕窗口数
function roundPreview(channelArr,windowArr){
	var totleTime =  Math.ceil(channelArr.length/windowArr.length);
	var remainder = channelArr.length%windowArr.length;//取余数
	if(time==totleTime){
		if(remainder==0){//整除
                        var channelStr  = "";
                        var windowStr = "";
			for(var j=0;j<windowArr.length;j++){
                            channelStr+= channelArr[((time-1)*windowArr.length)+j];
                            windowStr +=windowArr[j];
			}
                        alert("channelStr: "+channelStr);
                        alert("windowStr: "+windowStr);
		}else{
                        var channelStr  = "";
                        var windowStr = "";
			for(var k=0;k<remainder;k++){
			    channelStr+= channelArr[((time-1)*windowArr.length)+k];
                            windowStr +=windowArr[k];
			}
                        alert("channelStr: "+channelStr);
                        alert("windowStr: "+windowStr);
		}
		time = 1;
	}else{
                var channelStr  = "";
                var windowStr = "";
		for(var i=0;i<windowArr.length;i++){
	            channelStr+= channelArr[((time-1)*windowArr.length)+i];
                    windowStr +=windowArr[i];
		}
                alert("channelStr:"+channelStr);
                alert("windowStr:"+windowStr);
		time++;
	}
}
window.setInterval(roundPreview,10000,channelArr,windowArr);