<script>
function isinclude(v,arr){
for(o in arr) if(arr[o]==v) return true;
return false;
}
var p=new Array(2,5,1,78);
alert(isinclude(3,p))
</script>
function isinclude(v,arr){
for(o in arr) if(arr[o]==v) return true;
return false;
}
var p=new Array(2,5,1,78);
alert(isinclude(3,p))
</script>
<head>
<title>file</title>
<script language="javascript">
var arr=new Array("45","46","88","89","40");
function fncCha_txt(val)
{
for (i=0;i<arr.length;i++)
{
if (arr[i]==val)
{alert("和数組的第"+Number(i+1)+"個相等！");}
}
}
</script><body topmargin="0" leftmargin="0" marginheight="0" marginwidth="0">
<form >
<br>
<br>
<center>
<input type="text" name="txt" value="" onchange="fncCha_txt(this.value)">
</center></form>
</body>
</html>