QUOTE:
JavaScript奇偶判断代码
<Script language="JavaScript" type="text/javascript">
<!--
function chk(num){
return num?num%2?"奇数":"偶数":"0"
}
function show(num){
if(num=="") {alert("没有填写数字!");return false;}
if(isNaN(num)) {alert("非数字!");return false;}
if(num>9){alert("大于9被强行改为1");alert(chk(1));}else if(num<0){alert("小于0被强行改为0");alert(chk(0));}else if(num==0){alert(chk(0));}else{alert(chk(num))}
}
//-->
</Script>
<form name="abc">
<input name="num" id="num" type="text" value=""/>
<input name="chk" id="chk" type="button" value="检查" onclick="show(this.form.num.value)"/ >
</form>