//This file contains methods for cross browser scripting dealing with key events
//(ie. onKeyPress, onKeyUp, onKeyDown, etc)
/**
* This method returns true if the enter key was pressed, false otherwise.
*/
function enterKeyPressed(event) 
{
//13 = enter
return keyPressed(event, 13);
}
/**
* This method returns true if the tab key was pressed, false otherwise.
*/
function tabKeyPressed(event) 
{
//9 = enter
return keyPressed(event, 9);
}
/**
* This method returns true if the key having the specified charCode was pressed.
*/ 
function keyPressed(event, charCode) 
{
var keyPressed = false;
if (getKeyCharCode(event) == charCode) 
{
keyPressed = true;
}
return keyPressed;
}
/**
* This method returns the charCode value of the key pressed.
*/
function getKeyCharCode(event) 
{
var key = null;
if (window.event) {
//ie
key = window.event.keyCode;
} else if (event.which) {
key = event.which;
}
return key;
}
/**
* Prevents non-numeric values from being keyed into a field
*/
function isNumeric(event) 
{
// get the ASCII key code of the onKeyPress event
var isMozilla = false;
if (!window.event && event.which) 
{
isMozilla = true;
}
var key = getKeyCharCode(event);
var isNumeric = false;	
if (key != null) 
{
if (key >= 48 && key <= 57)	
{
// key is numeric
isNumeric = true;
} 
else if (key == 46) 
{
// key is a decimal point
isNumeric = true;
} 
else if (key == 13) 
{
//13 is a return
isNumeric = true;
} 
else if (key == 8 && isMozilla) 
{
//8 is a backspace with mozilla
isNumeric = true;
}
} 
else 
{
isNumeric = true;
}
return isNumeric;
}
/**
* Returns true if the entered key is the specified charCode value pressed
* in conjunction with the ctrl key.
*/
function keyIsCtrlWithCharCode(event, charCode) 
{
var isCharCode = false;
//ie
if (window.event) 
{
if (window.event.ctrlKey && window.event.keyCode == charCode) 
{
isCharCode = true;	
}
}
//mozilla
if (event.ctrlKey && event.which == charCode) 
{
isCharCode = true;
}
return isCharCode;
}
/**
* Returns true if the entered key is the specified charCode value pressed
* in conjunction with the shift key.
*/
function keyIsShiftWithCharCode(event, charCode) 
{
var isCharCode = false;
//ie
if (window.event) 
{
if (window.event.shiftKey && window.event.keyCode == charCode) 
{
isCharCode = true;	
}
}
//mozilla
if (event.shiftKey && event.which == charCode) 
{
isCharCode = true;
}
return isCharCode;
}
/**
* Returns true if the entered key is the specified charCode value pressed
* in conjunction with the alt key.
*/
function keyIsAltWithCharCode(event, charCode) 
{
var isCharCode = false;
//ie
if (window.event) 
{
if (window.event.altKey && window.event.keyCode == charCode) 
{
isCharCode = true;	
}
}
//mozilla
if (event.altKey && event.which == charCode) 
{
isCharCode = true;
}
return isCharCode;
}