<script language="JavaScript">
<!--
var a = "aBc";
var b = "AbC";
if (a.toLowerCase()==b.toLowerCase())
alert("ok");
//-->
</script>
<!--
var a = "aBc";
var b = "AbC";
if (a.toLowerCase()==b.toLowerCase())
alert("ok");
//-->
</script>
str2 = "AbC";if (str.toLowerCase() == str2.toLowerCase())
{
alert("they are same if 不区分大小写");
}