冒泡排序

var arr=[10,50,30,40,60,70,100,20,30];
    for(var i=0;i<arr.length-1;i++){
        var bool=true;
        for(var j=0;j<arr.length-1-i;j++){
            if(arr[j]>arr[j+1]){
                var temp=arr[j];
                arr[j]=arr[j+1];
                arr[j+1]=temp;
                bool=false;
            }
        }
        if(bool){
            break;
        }
    }
    document.write(arr);   //10,20,30,30,40,50,60,70,100