Monday, July 29, 2013

Decode html entities using javascript

Below is the code to decode the html entities using javascript rather than the Server side scripting

function decodeEntities(input) {
    var y = document.createElement('textarea');
    y.innerHTML = input;
    return y.value;
}

Above function just receives the html values like below

var str = "<p>Hello World<br />This is the test message";

When we pass the above HTML string to the function it returns as below,

calling the JAVASCRIPT function 

decodeEntities(str)

Output is: "&lt;p&gt;Hello World&lt;br/&gt;This is the test message";

Thursday, July 18, 2013

Disable right click in a page using javascript


When we want to restrict the right click of the mouse in some of the pages, need to add the below code in the <head> </head> tag within the JAVASCRIPT.

<script type="text/javascript">
var message="Sorry, Right Click has been disabled";
        function clickIE() {if (document.all) {window.console.log(message);return false;}}
       
       function clickNS(e) {
if (document.layers||(document.getElementById&&!document.all)) {
       if (e.which==2||e.which==3) {window.console.log(message);return false;}
}
}
        if (document.layers)
        {document.captureEvents(Event.MOUSEDOWN);document.onmousedown=clickNS;}
        else{document.onmouseup=clickNS;document.oncontextmenu=clickIE;}
        document.oncontextmenu=new Function("return false")

</script>


Monday, July 15, 2013

how to select all options in multi select dropdown using jquery


When we use multi select drop down, we may consider the feature for selecting all and deselect all option for the respective Multi Select box.

Using jQuery, we can easily do the select all and deselect all option for the dropdown.

Below is the code to select all using jQuery

HTML
<select name="education" id="education" multiple="multiple">
       <option value="1">Under Graduate</option>
       <option value="2">Graduate</option>
       <option value="3">Post Graduate</option>
       <option value="4">Pursuing Graduation</option>  
</select>

$('#education').find('option').attr('selected','selected');

Where 'education' is the id for the multi select & we are adding the attribute selected to get selected.

To deselect all using jQuery.

$('#education').find('option').removeAttr('selected','selected');