Primitive To Object Conversion Workaround?

Jun 2, 2010

I'm currently constructing a javascript "terminal" on a site I'm building so that I can test objects and functions outside of the web developer terminal in google chrome.

Given that I have active javascript defining an object called item, typing item in the chrome terminal returns Object and goes on to list the properties of item.

Moreover, I can define a function in the terminal like this: function(x) { return x }, and then function(item) will return Object and list the properties. However, if I use form data and user input in the place of the argument, the datatype becomes a string and not an object, so typing item in the form and clicking a button that performs function(document.form.text.value) returns the string item and not Object.

Is there any way to convert this primitive string to an object so that I can then iterate through properties, and so on?

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IsNumeric? Includes Object.focus() Workaround

Nov 21, 2005

I was having trouble getting the object.focus() method in IE and in FF working, so came up with this workaround.

What I wanted to do was check if a textfield was numeric, if not, inform the user then select the text and set the focus back to the field.

Sound simple? object.focus() simply doesn't work in firefox or (I've been informed) IE.

Solution:

Instead of checking when the field losing focus (onblur), check when the next field receives focus (onfocus). Then call a function that gets the element index of the object, and use that index to check the element above it. Difficult to explain.

Here it is...for the textfield you want to check, put this into the next form object after it onfocus="checkNum(this)"

then put this script in the header section...


function checkNum(obj){
var idx;
//get object index
for(idx=0;idx<document.forms[0].elements.length;idx++){
if(document.forms[0].elements[idx].name==obj.name){
break;
};
};
//check for numeric
if (isNaN(document.forms[0].elements[idx-1].value)){
alert('Value must be a number!');

document.forms[0].elements[idx-1].select();
document.forms[0].elements[idx-1].focus();
};
};


But there is one problem!!! As I just found out.

If the next field is a group option, they all have the same name and so this will not work.

for those that do not know, the function isNaN is a js function that is the same as the vbscript equivalent IsNumeric.

isNaN means isNotaNumber.

Hope this helps, I know the focus() failure of JS has been the bane of many coders.

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Sep 2, 2011

I have such problem when I post my object from client to server (php).

The object should be like so:

Code:

I converti it:

Code:

And send it though jquery and ajax:

property val is the object...

Then on side of server I gota string $_POST["val"]:

Code:

I try to convert it:

Code:

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Jul 23, 2005

How can I avoid type-conversion (object variable --> string) when
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Example:
-->
catch(myerrorobject)
alert(myerrorobject.filename);
{
my_function('bla: ',myerrorobject);
}
<---

I get the "myerrorobject.filename" in the alert-Box, but I get an
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properties) in the function "my_function". Why?

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I'm having trouble sending JSON data; error msg [code]it works if i hard-code the values, but when i use the user-defined variables i get the error.[code]

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Stack trace :

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I have also added the [ScriptService] attribute to the web service.

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Feb 6, 2007

we probably all know the problem that select boxes under IE are always
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1. hiding the select box
2. IFrame beneath the DIV layer

But I don't know how to do that.

We want to show a DIV layer as tooltip.
The DIV layer has no defined size (neither a width nor a height
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My questions:

1. How can I know when the tooltip is 'over' a select box, so I can hide it.

2. How can I define an IFrame that has the same size as the tooltip,
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Mar 16, 2007

I have an onchange method for a select box that goes something like
this (the select is in a form named aForm):

function page_on_change() {
pageElement = aForm.my_page_id;
aForm.nav_page_name.value =
pages[pageElement.options[ pageElement.selectedIndex ].value];
var si = pageElement.selectedIndex;
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document.getElementById("id_" + i).style.display='none'
}
document.getElementbyId("id_" + si).style.display='none'
}

IE fails on the statement:

document.getElementbyId("id_" + si).style.display='none'

and says it doesn't support this property.

What is the workaround?

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Jan 15, 2010

use something like this to workaround the lack of a "Select All Friends" button for Facebook groups, events and pages?

<html>
<frameset cols="25%,75%">
<frame name=inviteall src="inviteall.html">
<frame name=main src="http://www.facebook.com">
</frameset>

[Code]...

This bit isn't mine, I found it. You normally have to use this by copying it and then pasting it into the address bar when you are on the "Select Friends" screen.

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Dec 9, 2010

I have developed a widget. I am using the jquery core api. Im having a problem when the widget is used in a weebly site. I know weebly uses prototype and I am using the workaround:

var $j = jQuery.noConflict(); however there is still a clash of some sort. I think every prototype.js function is being called or something because the page is taking a long long time to load as there are many requests being made which look like this:

[Code]...

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Jul 20, 2005

I was calling a function in a js file from an image onClick event, but
someone still using Netscape 4 (!) complained that it didn't work. I
read that img onClick doesn't work in Netscape 4, so swithced it to
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that it was not wise to do that, here's the working version, using the
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<a href="javascript:show('art_2.jpg',',^');" target="_self">

I'd appreciate any suggetions that will let me call the "show" function
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Code:

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Here is how i try changing it:

Code:

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Is it possible to write a script that will duplicate the mailto: form action and keep it client side? Big hurdle is that it has to pull info from all types of form elements, just like the mailto: protocol does with email clients that actually support it properly.

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Jul 23, 2005

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Jul 23, 2005

I have a string that is encoded simply by replacing the letter with the
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Following is the function:

function cnvtBack(encoded)
{
var orig = "";
for (i=0; i < encoded.length; i++)
{
var letter = "";
letter = encoded.charAt(i);
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so my professor suddenly took a left turn in class and we jumped from using HTML and CSS to programing in Javascript. It's not even covered in the book we're using for a text book. So I'm having some problems with it (big surprise right?) My assignment: Write a Java Script that will print out the Temperature in Celcius from 0 to 35, AND the corrosponding temperature in Fahrenheit. So basically it would generate the following:

0 Degrees in Celcius is Equivalent to 5 Degrees Fahrenheit
1 Degrees in Celcius is Equivalent to 6.125 Degrees Fahrenheit
2 Degrees in Celcius is Equivalent to 7.25 Degrees Fahrenheit
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Here's the code I have so far:

[Code]....

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javascript Code:

document.all.SalesOrderForm.ShipNote1.value = document.all.SalesOrderForm.ShipNote1.value.replace(/'/g,""");
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Some words are in swedish, but the only two i think you need to understand is:

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Code:
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