javascript小实例

rel="File-List" href="file:///C:/DOCUME~1/aa/LOCALS~1/Temp/msohtml1/03/clip_filelist.xml" />

模拟时钟

function firstMethod(){

    var date = new Date();

        document.getElementById("first").innerHTML=date.toLocaleString();

       setTimeout("firstMethod()",1000);

       }

document.getElementById("first")；获得的是一个图层区域,既是一个用于显示时钟的区域

<div id="first" style="color: green;font-size: 30px">

</div>

setTimeout("firstMethod()",1000);每隔1000毫秒调用一次firstMethod()；

 

 

模拟生成验证码

function createRandomRand(){

   var str="0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z," + "A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z";

    var strs = str.split(",");//分割字符

    var rand = "";//保存生成的验证码

    for(var i = 0; i < 4 ;i++){

       rand += strs[Math.floor(Math.random()*strs.length)];

    }

       alert("生成的随机验证码为："+rand);

    }