Kangry.com [insert cool graphic here]
home | Topics | Logout | Search | Contact | ?? Kangry ?? | Bandwitdh
Topics:
DVR
nvrec
Mplayer
Links
Misc
Commands
Humor

Name

Password

New user

uploaded files
(links)-> (Parent)->Javascript code samples submited by Russell Wed 25 Jan 06
Edited Thu 05 Jun 14
Web kangry.com
This is a collection of stuff I had to lookup, so I put it here so I won't have to do that again.

Find in string ( would be find(haystack,needle) in a real language) 
  if (haystack.indexOf(needle)>0)
                {do something};


Document url info:


document.location.href


Move object to absolute location on screen:

Assumes the image has the id=xyzzy and has style='position:absolute;'

var moveMe = document.getElementById("xyzzy");
moveMe.style.left = xPos + "px";
moveMe.style.top = yPos + "px";




test if Varible exists in javascript


find the absolute (x,y) of an image (IE safe)
 


This one was an annoying 'gotcha':

in HTML/CSS the code is :

text-decoration: line-through


But in javascript the it turns out the code is: 


object.style.textDecoration="line-through";


The dash is dropped, and the D is uppercased... How the F*ck was I supposed to just magicly know that ??
 



test (dumps all the style atributes of the link into an alert box)

The code:

function dump_propertys(object_id){
var object_to_dump = document.getElementById(object_id);
var message="";
for(n in object_to_dump.style)
   {
     message=message+n+" "+object_to_dump.style[n]+";";
   };
alert (message);
}





Javascript submit form The Archive has it This is a simple trick that will let you have a simple text link submit a form. sadly it should be a one line call, but this works. 


Read the value of a radiobutfon

I found a good example here finding the value of a radio button



function get_radio_value()
{
var rad_val="";

for (var i=0; i < document.form-name.name-of-radio-button-array.length; i++)
   {
   if (document.form-name.name-of-radio-button-array[i].checked)
      {
      rad_val = document.form-name.name-of-radio-button-array[i].value;
      }
   }
return rad_val;
}


This little trick goes through the existing buttons and if it finds one checked (selected) it returns that value. Note: you must actually set the value attribute in the html for this to work ;-)


force javascript to treat a string as a number



number=parseInt(string)

 


Replace text/html on a page


document.getElementById('area_id').innerHTML = 'new text/html';


Requires that you have an area predefined
 <span id='area_id'>This text will be replaced</span>

also works with div. 











Replys: