<script>
function testnum(para){
if(/\./g.test(para))
return "不是整数!"
else{
if(para%2==0)
return "偶数!"
else
return "奇数!"
}
}
alert(testnum(12));
alert(testnum(13));
</script>
function testnum(para){
if(/\./g.test(para))
return "不是整数!"
else{
if(para%2==0)
return "偶数!"
else
return "奇数!"
}
}
alert(testnum(12));
alert(testnum(13));
</script>
var n = 4 ;
alert(n%2==0?"偶数":"奇数") ;
n = 5 ;
alert(n%2==0?"偶数":"奇数") ;
var s = "4" ;
alert((parseInt(s)%2)==0?"偶数":"奇数") ;
s = "5" ;
alert(parseInt(s)%2==0?"偶数":"奇数") ;
</script>