<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>函数豹子问题</title></head><body>
</body></html>你能跑过豹子吗？输入能或不能：<input type="text" id="baozi" /><input type="button" value="能否跑过豹子" οnclick="qiankun()"/><script>function qiankun(){ var baozi=document.getElementById("baozi").value if(baozi!="") { if(baozi=="能") { alert("你比禽兽还禽兽。") } else if(baozi=="不能") { alert("你连禽兽都不如。") } else { alert("请输入有效内容！！！") } }} </script>