javascript学习笔记：随机数统计

 1<div id="div1"></div>
 2<div id="div2"></div>
 3
 4<script>
 5function write1(){
 6    var i = 0;
 7    for(i=0;i<10;i++){
 8        document.getElementById("div1").innerHTML += Math.ceil(Math.random()*10)+";";
 9        }
    
   // setTimeout("write1()",100);
}

function count1(){
    var testArr = document.getElementById("div1").innerHTML.split(";")
    var arrLth = testArr.length;
    var textStr="";
    var count1=0,count2=0,count3=0,count4=0,count5=0,count6=0,count7=0,count8=0,count9=0,count10=0;
    for(i=0;i<=arrLth-1;i++){
        switch(eval(testArr[i])){
        case 1:count1+=1;
               break;
        case 2:count2+=1;
               break;
        case 3:count3+=1;
               break;
        case 4:count4+=1;
               break;
        case 5:count5+=1;
               break;
        case 6:count6+=1;
               break;
        case 7:count7+=1;
               break;
        case 8:count8+=1;
               break;
        case 9:count9+=1;
               break;
        case 10:count10+=1;
               break;
        }
       
    }
     
   
    for(i=1;i<=10;i++){
       textStr+=  "count"+i+"的值为："+eval("count"+i)+"</br>";
    }
    document.getElementById("div2").innerHTML =textStr;

}
</script>


<input id="Button1" type="button" value="button" onclick="write1()" />
<input id="Button2" type="button" value="统计" onclick="count1()" />