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JavaScript - Quick Question On Assigning Method To Object
function get_price()
{ var the_price=1000; if (this.speed=="500MGz") the_price+=200; else the_price+=100; if (this.hdspace=="15GB") the_price+=50; else the_price+=25; if (this.ram=="128MB") the_price+=150; else the_price+=75; return the_price; } function computer(speed,hdspace,ram) { this.speed=speed; this.hdspace=hdspace; this.ram=ram; this.price=get_price; } var work_computer=new computer("2GHz","80GB","1GB"); var home_computer=new computer("1.5GHz","40GB","512MB"); var laptop_computer=new computer("1GHz","20GB","256MB"); var work_computer_price=work_computer.price(); var home_computer_price=home_computer.price(); var laptop_computer=laptop_computer.price(); ___________________________________________________ In the above code, the line I'm having trouble with is marked red. Why is it that when I call the method using ... this.price = get_price; It works fine. But if I assign the object this.price with like this... this.price = get_price(); I get an error? Isn't get_price() a function? So shouldn't the parenthesis be included when the method is called? Why are we suppose to leave out the parenthesis?! I'm confused. Thanks! Similar TutorialsHere's my object constuctor: Code: function suggest_object(result_id)
{
this.in_result_div = false;
this.search_element = document.getElementById(result_id);
}
And the execution code: Code: var suggest = new suggest_object(result_id);
document.getElementById(result_id).onmouseover = function(){suggest.in_result_div = true;}
It works as is, but i'd really like to be able to set the onmouseover inside of the object. Something like Code: function suggest_object(result_id)
{
this.in_result_div = false;
this.search_element = document.getElementById(result_id);
this.input_element.onmouseover = function()
{
this.in_result_div = true;
}
}
So how can I get the 'this' inside the onmouseover function to refer to the object? I could not figure out the answer, and could not find the answer from Google. I have following object PHP Code: ; var obj = function() { ; this.method_1 = function() { ; return this.method_2 } ; this.method_2 = function() { ; return 'my parameter' } } It works. If I want method_2 having parameter, I write it this way: PHP Code: ; var obj = function() { ; this.method_1 = function() { ; return this.method_2 } ; this.method_2 = function(para) { ; return para } } ; var newObj = new obj() ; window.alert(newObj.method_2('my parameter')) It works and returns "my parameter". If I want method_2's parameter to be assigned by method_1, I write it this way: PHP Code: ; var obj = function() { ; this.method_1 = function() { ; return this.method_2('my parameter') } ; this.method_2 = function(para) { ; return para } } It does not work. So, the question is how to assign a parameter of a method by another method? Thanks a lot. Hello, I was able to solve an issue I had in previous post in writing some code to grab a section of a cookie value string (2 letter state ex MD) and check against it to do something. That was easy because the state was at the end of the string and all I had to do was use the slice() method. Now I was to be able to grab the 2 letter state from a string that looks like this: BALTIMORE, MD|blah blah|blah blah|blah blah (the real cookie value string will always be separated with pipes (|)) Can anyone please help? Thanks in advance! Code: <HTML>
<HEAD>
<TITLE></TITLE>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>
<SCRIPT LANUAGE="JavaScript">
function setCookie(name, value, expires, path, domain, secure) {
document.cookie= name + "=" + escape(value) +
((expires) ? "; expires=" + expires.toGMTString() : "") +
((path) ? "; path=" + path : "") +
((domain) ? "; domain=" + domain : "") +
((secure) ? "; secure" : "");
}
function getCookie(name) {
var dc = document.cookie;
var prefix = name + "=";
var begin = dc.indexOf("; " + prefix);
if (begin == -1) {
begin = dc.indexOf(prefix);
if (begin != 0) return null;
} else {
begin += 2;
}
var end = document.cookie.indexOf(";", begin);
if (end == -1) {
end = dc.length;
}
return unescape(dc.substring(begin + prefix.length, end));
}
</SCRIPT>
</HEAD>
<BODY>
<script>
$(function(){
$('div').each(function(){
if($(this).hasClass('stateSelect1')){
if (getCookie("location")!=null){
var state = getCookie("location").slice(-2).toLowerCase();
var stateArray = [];
stateArray = $(this).attr('rel').toLowerCase().split(',');
if($.inArray(state,stateArray) >= 0){
$(document).ready(function(){
$(".stateSelect0").css("display","none");
$(".stateSelect1").css("display","block");
});
}
}
}
});
});
</script>
<strong>Step 1. Copy and paste in cookie set text field:</strong> <br>
<br>
<strong>Show Image1:</strong><br>
CHARLOTTE, NC|blah blah|blah blah|blah blah|blah blah<br>
BALTIMORE, MD|blah blah|blah blah|blah blah<br>
<br>
<strong>Show Image2:</strong><br>
COLUMBIA, SC|blah blah|blah blah|blah blah<br>
RESTON, VA|blah blah|blah blah|blah blah<br>
<br>
<strong>Show Image3:</strong><br>
LOS ANGELES, CA|blah blah|blah blah|blah blah<br>
SEATLE, WA|blah blah|blah blah|blah blah<br>
<br>
<br>
<strong>Step 2.</strong>
<input type="button" value="Set Cookie" onclick='setCookie("location", prompt("Enter your location"))' />
<br>
<br>
<strong>Step 3.</strong> Now refresh page. <br>
<br>
<style>
.default{ border:3px solid limegreen; margin-bottom:5px; width:200px}
.div1{ border:3px solid red; margin-bottom:5px; width:200px}
.div2 { border:3px solid purple; margin-bottom:5px; width:200px}
.div3 { border:3px solid yellow; margin-bottom:5px; width:200px}
.div4 { border:3px solid blue; margin-bottom:5px; width:200px}
</style>
<!--DEFAULT IMAGE IF NO COOKIE SET OR NON LISTED STATE-->
<div class="stateSelect0 default"> DEFAULT IMAGE </div>
<!--DEFAULT IMAGE IF NO COOKIE SET OR NON LISTED STATE-->
<div class="stateSelect1 div1" rel="NC,MD" style="display:none">Image 1 - DIV 1</div>
<div class="stateSelect2 div2" rel="SC,VA" style="display:none">Image 2 - DIV 2</div>
<div class="stateSelect3 div3" rel="WA,CA" style="display:none">Image 3 - DIV 3</div>
</BODY>
</HTML>
I'm Sunita. I am working in ASP .net . I have created Class1.dll file . and in javascript I am creating ActiveXobject . when i debug the application . Its gives error like Object doesn't support this property or method. my code is Code: Class1.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.IO.Ports;
namespace Ana7140
{
public class Class1
{
//Declare Variables
string data = "";
string log = "";
bool DoneDataReceived = false;
bool tare = false;
private SerialPort comport = new SerialPort();
public void send()
{
//Send comport
comport.Write("?1");
if (data.Length > 1)
{
data = data.Replace('\r', ' ');
char sign = data[1];
string DelimeterStr = "+-";
char[] delimiter = DelimeterStr.ToCharArray();
string[] splited = null;
splited = data.Split(delimiter);
data = Convert.ToString(sign) + Convert.ToString(Convert.ToDouble(splited[1]));
}
else
{
data = "";
}
}
public string GetValue()
{
//Send command to port
if (comport.IsOpen)
{
if (tare == true)
{
comport.Write("?1");
log = log + "Sent ?1 command";
//if (data.Length > 1)
//{
// data = data.Replace('\r', ' ');
// char sign = data[1];
// string DelimeterStr = "+-";
// char[] delimiter = DelimeterStr.ToCharArray();
// string[] splited = null;
// splited = data.Split(delimiter);
// data = Convert.ToString(sign) + Convert.ToString(Convert.ToDouble(splited[1]));
//}
//else
//{
// data = "";
//}
while (true)
{
if (DoneDataReceived == true)
{
DoneDataReceived = false;
break;
}
}
tare = false;
}//end of if(tare==true)
else
{
data = "-2";
}
}
else
{
data = "-1";
}
//This will return the data only
return data;
}
//To fetch the data from Serial Port
public void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
try
{
if (comport.IsOpen)
{
//Reading Data from Serial Port
data = comport.ReadLine();//.ReadExisting();
log += data;
// GetValue();
if (data.Length > 1)
{
data = data.Replace('\r', ' ');
char sign = data[1];
string DelimeterStr = "+-";
char[] delimiter = DelimeterStr.ToCharArray();
string[] splited = null;
splited = data.Split(delimiter);
data = Convert.ToString(sign) + Convert.ToString(Convert.ToDouble(splited[1]));
}
else
{
data = "";
}
DoneDataReceived = true; //Done with data processing
}
}
catch (Exception ex)
{
//MessageBox.Show(ex.Message);
}
}
public string getLog()
{
return log;
}
//This Function initialiases the serial port
//public void Initialise()
//{
// try
// {
// isInitialise = true;
// correct = false;
// init = true;
// //sending command to serial port for initialization
// //comport.Write("*\n");
// }
// catch (Exception ex)
// { }
//}
public void Tare()
{
try
{
//sending command to serial port for initialization
comport.Write("T\n");
tare = true;
}
catch (Exception ex)
{ }
}
//This function opens the comport
public void Start()
{
try
{
//if previously comport is open the firstly close this connection then open again comport
if (comport.IsOpen)
{
comport.Close();
}
else
{
//set Baudrate value as 300
comport.BaudRate = 300;
//to read data in string set Data bits as 8
comport.DataBits = 8;
//set stop bits as 1
comport.StopBits = (StopBits)1;
//set parity bit as None
comport.Parity = (Parity)Enum.Parse(typeof(Parity), "None");
//Set Port Name as COM1
//comport.PortName = "COM1";
//Set Read Time Out as 100
comport.ReadTimeout = 100;
//Open comport
comport.Open();
//Call event for serial data received
comport.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived);
//data = "";
// comport.Write("?1");
}
}
catch (Exception ex)
{
}
}
//close the connection and close the comport
public void Stop()
{
try
{
//check whether comport is open or not
//if comport is open then close the comport
if (comport.IsOpen)
{
//comport.ReadExisting();
comport.Close();
}
}
catch (Exception ex)
{ }
}//End of Stop
//To check Connection is Opened or not
public string getStart()
{
string check = "";
try
{
if (comport.IsOpen)
{
check = "0"; //If the connection is opened,then check=0
}
else
{
check = "-1"; //If the connection is closed,then check=-1
}
}//End of try
catch (Exception ex)
{ }
return check;
}//End of getStart
}
}
JavaScript program is
<!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><title>
Untitled Page
</title>
<script language="javascript">
var wshell;
wshell=new ActiveXObject("Ana7140.Class1");
function GetVal()
{
var val= wshell.GetValue();
alert(val);
}
function setip()
{
wshell.Start();
wshell.Initialise();
alert(val);
}
function Stop()
{
wshell.Stop();
//alert(val);
// wshell.Stop();
//alert(val);
}
function Tares()
{
wshell.Tares();
//alert(val);
// wshell.Stop();
//alert(val);
}
</script>
</head>
<body>
<form name="form1" method="post" id="form2">
<div>
<a href="#" onclick="javascript:setip()"> Connect </a>
<a href="#" onclick="javascript:GetVal()"> Acquire Weight </a>
<a href="#" onclick="javascript:Stop()"> Disconnect </a>
<a href="#" onclick="javascript:Tares()"> Tares </a>
</div>
</form>
</body>
</html>
plz help me My website is working perfectly on Firefox but when I visit it with IE(7), I get the following errors and some things aren't where they're supposed to be. Quote: Webpage Script Errors User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; InfoPath.2; .NET CLR 3.5.30729; .NET CLR 3.0.30618) Timestamp: Fri, 25 Sep 2009 08:31:56 UTC Message: Object doesn't support this property or method Line: 8 Char: 186 Code: 0 URI: http://icarwakim.com/media/system/js/mootools.js Message: Object doesn't support this property or method Line: 59 Char: 102 Code: 0 URI: http://icarwakim.com/media/system/js/mootools.js Website: http://www.icarwakim.com Any advise? Hello just a quick problem with a seemingly difficult solution that I'm not aware throughout. What I'm attempting to do is increment a value when the mouse hovers over the element by using this move_right function: Code: function Move_Right( event, element, number) {
number++;
var elem = document.getElementById(element);
elem.style.right = number + "px";
}
inside the mouseover event trigger function which I figured out. The problem is it doesn't move incrementally only once every mouse hover no matter the technique of setInterval(); and or setTimeout(); also ontop of this problem I'm getting errors like : 2014-10-12 20:07:57.785Uncaught TypeError: Cannot read property 'style' of null even after the changes I made also after this original function call : This is the current code so far which is different to the previous code above "obviously" : Edit fiddle - JSFiddle Thanks if someone knows the issues here, I hope it makes sense . for (var i=0; i < document.myform.registrationtype.length; i++) { if (document.myform.registrationtype[i].checked) { var registrationtype = document.myform.registrationtype[i].value; } } what is wrong with this? i'm trying to get the value of registrationtype (a radio box) i'm getting an error object doesn't support this propery or method Hello I am in need of help desperatley. I am trying to get a video to launch from my homepage. see test homepage here http://www.nuviewinc.com/index3.html the video should pop up and play. Like it does here- http://www.nuviewinc.com/testv.html But it doesnt... can anyone help this poor marketing manager with coding? I simply followed the directions here http://www.vmatrixonline.com/vplayer...structions.pdf. all the code appears correct. Hi All, Need some urgent. We are having a javascript which is throwing the foll error "Object doesn't support this property or method". The javascript function being called is using a Scanner API. So this is using some ActiveX. Below is the code for javascript <script language="javascript"> // Initialize scanning function OnLoad() { try { Scanner.OpenScanner(); // Scanner.ScanPriority = 0; // Set scanner to Foreground Read mode before enable scanning // Scanner.EnableScanning(1); document.forms["mobileform"]["rm07m-bwartwe[1]"].value = "101"; } catch (e) { alert(e.message); } } // Clean up function OnUnload() { Scanner.CloseScanner(); // Calling Dispose is necessary for Pocket IE because of a Microsoft issue related to releasing object. if (navigator.appName == "Microsoft Pocket Internet Explorer") Scanner.Dispose(); } // Scan through soft trigger function Scan() { try { Scanner.SetSoftTrigger(1); } catch (e) { alert(e.message); } } //User-defined function to format error codes. //VBScript has a Hex() function but JScript does not. function hex(nmb) { if (nmb > 0) return nmb.toString(16); else return (nmb + 0x100000000).toString(16); } </script> There is a object tag in html <object id="Scanner"></object> The javascript functions are called from body tag. Can someone please provide some help. Thanks, Nikhil Hi, When I try and geocode an addres to my google map I receive the error: Object does not support this method or property I have gone over the script and can't work out what I did wrong. Code: <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html {height:250px}
body {height:250px}
#bookmark_map {width:90%; height:250px; margin-left:15px;}
</style>
<script type="text/javascript"
src="http://maps.google.com/maps/api/js?sensor=true" />
</script>
<script type="text/javascript">
var geocoder;
var map;
function createGMapFromAddress(){
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(0,0);
var map_options = {
zoom: 4,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map = new google.maps.Map(document.getElementById("bookmark_map"), map_options);
}
function loadBookMarkMap(location){
alert(location);
var address = location;
alert(address);
geocoder.geocode({address: address}, function(results, status){
if (status == google.maps.GeocoderStatus.OK && results.length){
if (status != google.maps.GeocoderStatus.ZERO_RESULTS){
map.set_center(results[0].geometry.location);
var marker = new google.maps.Marker({
position: results[0].geometry.location,
map: map
});
}
} else {
alert("Geocode was unsuccessful due to: " + status);
}
});
alert(marker);
}
</script>
</head>
<body onload="createGMapFromAddress()">
//php get from table
$possumshaw ="{$row['address']}"; }
echo '<input type="button" class="button4" value="View Map" onclick="loadBookMarkMap(\'' . $possumshaw . '\')" />';
?>
I found strange for the following code: Code: var allextRules = Ext.util.CSS.getRules();
Object.keys(allextRules).forEach(function(key) {
var keyname = key;
if(keyname.indexOf("js") != -1){
Ext.util.CSS.removeStyleSheet(keyname);
console.log(keyname + " Removed");
}
});
When the above work is tested in other browser (say - Google Chrome), there is no error. However, when tested in IE 9, there is error as follows: Code: SCRIPT438: Object doesn't support property or method 'keys' According to this article (https://developer.mozilla.org/en/Jav...ts/Object/keys), the Object.keys is supported by IE. Have I miss out something? Urghh I've always done it this way but it's nagging me. Is there a better way of checking if a value is equal to 1 or 2 or 3 than doing it this way. Code: if(var === Cat || var === Dog || var === Chicken || var === Frog) Not working code ^ lol Cheers guys can I have a function and a variable be the same name in an object for instance Code: function someObject(){
this.canDoSomething;//a boolean variable
function canDoSomething(){
//set this.canDoSomething;
return this.canDoSomething;
}
}
or will this be a naming conflict? thanks using jquery and cookie plugin. i made a popup window. when the user clicks on a check box the window closes, forwards them to a new page, and then sets a cookie. i need it so that when they go back to the original page (where the popup came from) if the browser detects the cookie then the popup does not occur. I do not know why this does not work because when I alert the value of the cookie out, it gives me the correct number. something must be wrong in my logic ? code on the base page. Code: <script type="text/javascript">
var test123 = $.cookie('FBCheck');
if ( test123 != 1212){
function popup(Site)
{
window.open(Site,'PopupName','toolbar=no,statusbar=no, location=no,scrollbars=no,resizable=no,width=350,height=500')
}
}
</script>
code on popup (both files are in same directory) Code: $(document).ready(function() {
$("#Cbox").click(function() {
window.open ("http://www.google.com", "Google");
window.close();
$.cookie('FBCheck', '1212', {expires: 365, path: '/'});
});
});
The jquery source is installed as is the plugin. Thanks so much for your help in advance! I put the jquery script into my subdirectory. In the header which one is correct: Code: <script type="text/javascript" src="../jquery/jquery.js"></script> or Code: <script src="../jquery/jquery.js"></script> And there is this code: do I put this in the body and enclose it with the <script>tag? Code: $(function(){
// set interval for 5 minutes
setInterval(function(){
$.ajax({url: "keep-alive.php"});
}, 300000);
});
I found this "game" that helps you practice regexp. I'm stuck on this one: Was wondering if someone could help me quickly, i'm have a strange issue with a slideshow i have built in javascript. The slideshow works fine until you add any other image onto the page like a banner or anything. As soon as you do that when you click next on the slideshow that image or banner with change to the next picture instead of the desired image if that makes any sense... Would appreciate any help, thank you! here is the link to my practice website, so you can see what is going on pretty new to all of this.. http://dpetersen.net46.net/advancedw...l.html?agree=0 So i have this algorithm and im not sure how to translate it into javascript if (the Round Trip button is checked) double the fare my fare calculated works correctly based on the distance traveled, but how do i make it so that when round button is checked the fare gets doubled, im not quite sure how to make that a code Hi, Ever seen on the iphone where you have to slide the slider across the screen to unlock it? I have a duplicate of this using javascript but no matter what I try I cannot make it redirect. I want the page to be redirected after the slider has gone to the other side. Heres the HTML Code: <!DOCTYPE html> <head> <meta charset='UTF-8'> <title>Slide To Unlock</title> <link rel='stylesheet' href='css/style.css'> <script src='http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js'></script> <script src='http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.2/jquery-ui.min.js'></script> <script src='js/slidetounlock.js'></script> </head> <body> <div id="page-wrap"> <div id="well"> <h2><strong id="slider"></strong> <span>slide to unlock</span></h2> </div> </div> </body </html> And the javascript Code: $(function() {
$("#slider").draggable({
axis: 'x',
containment: 'parent',
drag: function(event, ui) {
if (ui.position.left > 550) {
$("#well").fadeOut();
} else {
// Apparently Safari isn't allowing partial opacity on text with background clip? Not sure.
// $("h2 span").css("opacity", 100 - (ui.position.left / 5))
}
},
stop: function(event, ui) {
if (ui.position.left < 551) {
$(this).animate({
left: 0
})
}
}
});
// The following credit: http://www.evanblack.com/blog/touch-slide-to-unlock/
$('#slider')[0].addEventListener('touchmove', function(event) {
event.preventDefault();
var el = event.target;
var touch = event.touches[0];
curX = touch.pageX - this.offsetLeft - 73;
if(curX <= 0) return;
if(curX > 550){
$('#well').fadeOut();
}
el.style.webkitTransform = 'translateX(' + curX + 'px)';
}, false);
$('#slider')[0].addEventListener('touchend', function(event) {
this.style.webkitTransition = '-webkit-transform 0.3s ease-in';
this.addEventListener( 'webkitTransitionEnd', function( event ) { this.style.webkitTransition = 'none'; }, false );
this.style.webkitTransform = 'translateX(0px)';
}, false);
});
Hi guys, just a quick question about a line break in JavaScript, where would I do it? If you see I have two math operators here and want them to be on two separate lines, were do I put the line break? Thanks Code: <!doctype html> <head> </head> <body> <script type="text/javascript"> var apples = 4+76; document.write(apples); var multiple = 54*11; document.write(multiple); </script> </body> </html> |
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