<!--
today=new Date();
jran=today.getTime();

function rnd() {

    ia=9301;
    ic=49297;
    im=233280;

    jran = (jran*ia+ic) % im;
    return jran/(im*1.0);
};

function rand(number) {

    return Math.ceil(rnd()*number);
};


for(i=1;i<=1;i++) {
    myNum=(rand(19)); //改成你要随机显示的图片数；
    if(myNum == 1) document.write("<img src='images/m1.jpg'>"); 
if(myNum == 2) document.write("<img src='images/m2.jpg'>"); //图片路径，可用http://
if(myNum == 3) document.write("<img src='images/m3.jpg'>"); 
if(myNum == 4) document.write("<img src='images/m4.jpg'>"); 
if(myNum == 5) document.write("<img src='images/m5.jpg'>"); 
if(myNum == 6) document.write("<img src='images/m6.jpg'>"); 
if(myNum == 7) document.write("<img src='images/m7.jpg'>"); 
if(myNum == 8) document.write("<img src='images/m8.jpg'>"); 
if(myNum == 9) document.write("<img src='images/m9.jpg'>"); 
if(myNum == 10) document.write("<img src='images/m10.jpg'>"); 
if(myNum == 11) document.write("<img src='images/m11.jpg'>"); 
if(myNum == 12) document.write("<img src='images/m12.jpg'>"); 
if(myNum == 13) document.write("<img src='images/m13.jpg'>"); 
if(myNum == 14) document.write("<img src='images/m14.jpg'>"); 
if(myNum == 15) document.write("<img src='images/m15.jpg'>"); 
if(myNum == 16) document.write("<img src='images/m16.jpg'>"); 
if(myNum == 17) document.write("<img src='images/m20.jpg'>"); 
if(myNum == 18) document.write("<img src='images/m21.jpg'>"); 
if(myNum == 19) document.write("<img src='images/m22.jpg'>"); 



    else {
document.write();
}

};

//-->
