<!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>无标题文档</title>
<script language="javascript" type="text/javascript">
function checkCharType(charToCheck)
{
var returnValue = "O";
var charCode = charToCheck.charCodeAt(0);
if(charCode >= "A".charCodeAt(0) && charCode <= "Z".charCodeAt(0))
{
returnValue = "U";
}
else if (charCode >= "a".charCodeAt(0) && charCode <= "z".charCodeAt(0))
{
returnValue = "L";
}
else if(charCode >= "0".charCodeAt(0) && charCode <= "9".charCodeAt(0))
{
returnValue = "N";
}
}
</script>
</head><body>
<script type="text/javascript" language="javascript">
var myString = prompt("Enter some text", "Hello World!");
switch(checkCharType(myString))
{
case "U":
document.write("U");
break;
case "L":
document.write("L");
break;
case "N":
document.write("N");
break;
default:
document.write("First character was not a character or a number");
}</script>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script language="javascript" type="text/javascript">
function checkCharType(charToCheck)
{
var returnValue = "O";
var charCode = charToCheck.charCodeAt(0);
if(charCode >= "A".charCodeAt(0) && charCode <= "Z".charCodeAt(0))
{
returnValue = "U";
}
else if (charCode >= "a".charCodeAt(0) && charCode <= "z".charCodeAt(0))
{
returnValue = "L";
}
else if(charCode >= "0".charCodeAt(0) && charCode <= "9".charCodeAt(0))
{
returnValue = "N";
}
}
</script>
</head><body>
<script type="text/javascript" language="javascript">
var myString = prompt("Enter some text", "Hello World!");
switch(checkCharType(myString))
{
case "U":
document.write("U");
break;
case "L":
document.write("L");
break;
case "N":
document.write("N");
break;
default:
document.write("First character was not a character or a number");
}</script>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script language="javascript" type="text/javascript">
function checkCharType(charToCheck)
{
var returnValue = "O";
var charCode = charToCheck.charCodeAt(0);
if(charCode >= "A".charCodeAt(0) && charCode <= "Z".charCodeAt(0))
{
return "U";
}
else if (charCode >= "a".charCodeAt(0) && charCode <= "z".charCodeAt(0))
{
return "L";
}
else if(charCode >= "0".charCodeAt(0) && charCode <= "9".charCodeAt(0))
{
return "N";
}
}
</script>
</head><body>
<script type="text/javascript" language="javascript">
var myString = prompt("Enter some text", "Hello World!");
switch(checkCharType(myString))
{
case "U":
document.write("U");
break;
case "L":
document.write("L");
break;
case "N":
document.write("N");
break;
default:
document.write("First character was not a character or a number");
}</script>
</body>
</html>