<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<input type="text" id="number1">
<input type="button" value="逆序输出" onclick="fun1()">
<input type="text" id="number2">
<script>
function fun1(){
var x=document.getElementById("number1").value;
var r;
var s="";
while(x!=0){
r=x%10;
x=parseInt(x/10);
s=s+r;
}
document.getElementById("number2").value=s;
//document.write(s);
}
/*var s=1;
for(var f=1,i=2;i<=100;i++,f=-f){
s+=f*i;
}
document.write("1+2-3+4-5+...+98-99+100="+s);
document.write("<br>");
var ff=1,ii=2,ss=1;
while(ii<=100){
ss+=ff*ii;
ff=-ff;
ii++;
}
document.write("1+2-3+4-5+...+98-99+100="+ss);
document.write("<br>");
var sss=1;fff=1;iii=2;
do{
sss+=fff*iii;
fff=-fff;
iii++;
}while(iii<=100);
document.write("1+2-3+4-5+...+98-99+100="+sss);*/
</script>
</body>
</html>
