Page 169 - DCAP408_WEB_PROGRAMMING

Unit 5: Scripting Language

var favorite = prompt(‘What is your favorite color?’, ‘RED’); Notes
// OR var favorite = window.prompt(‘What is your favorite color?’, ‘RED’);
// if (favorite) equivalent to if (favorite != null && favorite != “”);
if (favorite) alert(“Your favorite color is: “ + favorite);
else alert(“You pressed Cancel or no value was entered!”);
}
</SCRIPT>

Notes What happens when you press Cancel? The value null is returned.
confirm()

Confirm displays a dialog box with two buttons: OK and Cancel. If the user clicks on OK the
window method confirm() will return true. If the user clicks on the Cancel button confirm()
returns false.

<INPUT TYPE=”button” VALUE=”confirm” onClick=”respConfirm()”>
The confirm dialog box returns a Boolean value based on the user’s selection.
With function code:
<SCRIPT LANGUAGE=”JavaScript”>
function respConfirm () {
var response = confirm(‘Confirm Test: Continue?’);
// OR var response = window.confirm(‘Confirm Test: Continue?’);
if (response) alert(“Your response was OK!”);
else alert(“Your response was Cancel!”);
}
</SCRIPT>

Notes Response will be:
1. true if OK is pressed

2. false if Cancel is pressed
5.9 String Manipulation Functions

The most important string manipulation functions are the following:
 length
 toLowerCase

 toUpperCase
 charAt
 indexOf

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