8 practical jQuery tips

1) disable right-click function
If you want to protect your site for your users, developers can use this code to disable right-click functionality.

$(document).ready(function() {
 //catch the right-click context menu
 $(document).bind("contextmenu",function(e) {     
  //warning prompt - optional
  alert("No right-clicking!");
  //delete the default context menu
  return false;
 });
});

2) use jQuery to set the text size
Using this code, the user can resize the text (increase or decrease) as needed.

$(document).ready(function() {
 //find the current font size
 var originalFontSize = $('html').css('font-size');
 //Increase the text size
 $(".increaseFont").click(function() {
  var currentFontSize = $('html').css('font-size');
  var currentFontSizeNumber = parseFloat(currentFontSize, 10);
  var newFontSize = currentFontSizeNumber*1.2;
  $('html').css('font-size', newFontSize);
  return false;
 });
 //Decrease the Text Size
 $(".decreaseFont").click(function() {
  var currentFontSize = $('html').css('font-size');
  var currentFontSizeNum = parseFloat(currentFontSize, 10);
  var newFontSize = currentFontSizeNum*0.8;
  $('html').css('font-size', newFontSize);
  return false;
 });
 // Reset Font Size
 $(".resetFont").click(function(){
 $('html').css('font-size', originalFontSize);
  });
});

3) open the link in a new window
Using this code will help the user open a link in a new window, giving the user a better user experience.

$(document).ready(function() {
 //select all anchor tags that have http in the href
 //and apply the target=_blank
 $("a[href^='http']").attr('target','_blank');
});

4) change the styles list
Use this code to help you change the style list.

$(document).ready(function() {
 $("a.cssSwap").click(function() { 
  //swap the link rel attribute with the value in the rel    
  $('link[rel=stylesheet]').attr('href' , $(this).attr('rel')); 
 }); 
});

5) return to the top link
This code is useful for long clicks on a single page, and you can click the "back to top" feature at critical moments.

$(document).ready(function() {
 //when the id="top" link is clicked
 $('#top').click(function() {
  //scoll the page back to the top
  $(document).scrollTo(0,500);
 }
});

6) get the X/Y axis of the mouse pointer

$().mousemove(function(e){
    //display the x and y axis values inside the P element
    $('p').html("X Axis : " + e.pageX + " | Y Axis " + e.pageY);
});

7) detect the current mouse coordinates
Using this script, you can get mouse coordinates from any web browser.

$(document).ready(function() {
$().mousemove(function(e)
{
    $('# MouseCoordinates ').html("X Axis Position = " + e.pageX + " and Y Axis Position = " + e.pageY);
});

8) image preloading
This code helps users quickly load images or web pages.

jQuery.preloadImagesInWebPage = function() 
{
     for(var ctr = 0; ctr<arguments.length; ctr++)
     {
         jQuery("").attr("src", arguments[ctr]);
     }
}
To use the above method, you can use the following piece of code:
$.preloadImages("image1.gif", "image2.gif", "image3.gif");
To check whether an image has been loaded, you can use the following piece of code:
$('#imageObject').attr('src', 'image1.gif').load(function() {
    alert('The image has been loaded ... ');
});