<SCRIPT LANGUAGE="JavaScript"><!--
function es() {
alert("请先作好准备.")
x=0
var today=new Date()
sec=0
for (i=1;i<=5;i++) {
sec=today.getSeconds()
rand1 = 31
while ( rand1 > 30 ) {
rand1 = Math.random()*sec*100
rand1 = Math.ceil(rand1)
}
rand2 = Math.random()
if (rand2>0.5) {
mes="加上 ";
mes1=" 到 ";
y=rand1
}
else{
mes=" 减去 " ;
mes1=" 从 ";
y=-rand1
}
x1=x
x=x+y
if (x<0) {
mes="加上 ";
mes1=" 到 ";
x=x1+rand1
}
alert("请把原来结果"+mes+rand1+mes1+". ")
}
alert("请仔细想一下最后的结果.")
alert("最后结果为 "+x+" , 你算对了吗 ?")
}
//-->
</SCRIPT><FORM NAME="f"><INPUT TYPE="button" VALUE="开始啦" onClick="es()">