From time to time you have a string that contains numbers and letters and you need to split them.

This is very easy to do using Javascript.

Lets say you have this  string:

var string  = “due_date47″;

to create to vars that one will have “due_date” as value and the other “47″ do this:

<script type="text/javascript">var field = "due_date37";

var number=field.match(/\d/g).join('');

var nonnumber=field.match(/[^\d]/g).join('');

</script>

Easy!

Just use this:

document.getElementById(form_id).target= “_blank”;

Hope it helps!

Some time when you use Ajax to do an action you want to give the user an

indication that the action took place and everything went well. For example you have a text field that onchange action calls for a Javascript function that takes the value, sends it to PHP file, the PHP file gets the value and update the db and sends back to the Javascript function ‘Save’ message.

Now you want to display this message, but you also want that it will blink and disappear lets say after 3 seconds. Easy. All you have to do is from the Javascript function that gets the PHP value call to blinky function

<script type="text/javascript">
function blinky(it) {
  obj = document.getElementById(it);
  if (obj.style.visibility == "visible")
    {obj.style.visibility = "hidden";}
  else
    {obj.style.visibility = "visible";}
}

blink = setInterval("blinky's1')", 250);
</script>
<span id="s1">Save...</span>

and don’t forget to pass the div id as well…

Hope it helps!

It  took me long time to get it… I wanted to check if a checkbox was checked or not.
So I used:
var checkbox = document.getElementById("checkbox_id").value;

Wrong! Wrong! Wrong!

the right way is:

var checkbox = document.getElementById("checkbox_id").checked;

which return true or false. Minor details wasted me lots of time…

Admin

For beginners this could be helpful – How to get the value of each element in your page using Javascript?

Lets say you have <div id=”newid”></div>

use this:

var element_value = document.getElementById(&quot;newid&quot;).value;

Hope it helps!