開發中可能會用到的jQuery小技巧

原始文章出自於此


禁止右鍵
$(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;
    });
});

文本缩放
$(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);
  });
});

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

css切換方式
$(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'));
    });
});

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

預先載入圖片
jQuery.preloadImagesInWebPage = function() {
    for(var ctr = 0; ctr<arguments.length; ctr++){
        jQuery("").attr("src", arguments[ctr]);
    }
}

$.preloadImages("image1.gif", "image2.gif", "image3.gif");

$('#imageObject').attr('src', 'image1.gif').load(function() {
    alert('The image has been loaded…');
});