目录(?)[+]
本文转自:http://www.admin10000.com/document/909.html
下面列出了一些Jquery使用技巧。比如有禁止右键点击、隐藏搜索文本框文字、在新窗口中打开链接、检测浏览器、预加载图片、页面样式切换、所有列等 高、动态控制页面字体大小、获得鼠标指针的X值Y值、验证元素是否为空、替换元素、延迟加载、验证元素是否存在于Jquery集合中、使DIV可点击、克 隆对象、使元素居中、计算元素个数、使用Google主机上的Jquery类库、禁用Jquery效果、解决Jquery类库与其他Javascript 类库冲突问题。
1 $(document).ready(function(){ 2 $(document).bind("contextmenu",function(e){ 3 return false; 4 }); 5 });
1 $(document).ready(function() { 2 $("input.text1").val("Enter your search text here"); 3 textFill($('input.text1')); 4 }); 5 6 function textFill(input){ //input focus text function 7 var originalvalue = input.val(); 8 input.focus( function(){ 9 if( $.trim(input.val()) == originalvalue ){ input.val(''); } 10 }); 11 input.blur( function(){ 12 if( $.trim(input.val()) == '' ){ input.val(originalvalue); } 13 }); 14 }
1 $(document).ready(function() { 2 //Example 1: Every link will open in a new window 3 $('a[href^="http://"]').attr("target", "_blank"); 4 5 //Example 2: Links with the rel="external" attribute will only open in a new window 6 $('a[@rel$='external']').click(function(){ 7 this.target = "_blank"; 8 }); 9 }); 10 // how to use 11 open link
注: 在版本jQuery 1.4中,$.support 替换掉了$.browser 变量
1 $(document).ready(function() { 2 // Target Firefox 2 and above 3 if ($.browser.mozilla && $.browser.version >= "1.8" ){ 4 // do something 5 } 6 7 // Target Safari 8 if( $.browser.safari ){ 9 // do something 10 } 11 12 // Target Chrome 13 if( $.browser.chrome){ 14 // do something 15 } 16 17 // Target Camino 18 if( $.browser.camino){ 19 // do something 20 } 21 22 // Target Opera 23 if( $.browser.opera){ 24 // do something 25 } 26 27 // Target IE6 and below 28 if ($.browser.msie && $.browser.version <= 6 ){ 29 // do something 30 } 31 32 // Target anything above IE6 33 if ($.browser.msie && $.browser.version > 6){ 34 // do something 35 } 36 });
1 $(document).ready(function() { 2 jQuery.preloadImages = function() 3 { 4 for(var i = 0; i").attr("src", arguments[i]); 5 } 6 } 7 // how to use 8 $.preloadImages("image1.jpg"); 9 });
1 $(document).ready(function() { 2 $("a.Styleswitcher").click(function() { 3 //swicth the LINK REL attribute with the value in A REL attribute 4 $('link[rel=stylesheet]').attr('href' , $(this).attr('rel')); 5 }); 6 // how to use 7 // place this in your header 8 9 // the links 10 default.css>Default Theme 11 Red Theme 12 Blue Theme 13 });
如果使用了两个CSS列,使用此种方式可以是两列的高度相同。
1 $(document).ready(function() { 2 function equalHeight(group) { 3 tallest = 0; 4 group.each(function() { 5 thisHeight = $(this).height(); 6 if(thisHeight > tallest) { 7 tallest = thisHeight; 8 } 9 }); 10 group.height(tallest); 11 } 12 // how to use 13 $(document).ready(function() { 14 equalHeight($(".left")); 15 equalHeight($(".right")); 16 }); 17 });
用户可以改变页面字体大小
$(document).ready(function() { // Reset the font size(back to default) var originalFontSize = $('html').css('font-size'); $(".resetFont").click(function(){ $('html').css('font-size', originalFontSize); }); // Increase the font size(bigger font0 $(".increaseFont").click(function(){ var currentFontSize = $('html').css('font-size'); var currentFontSizeNum = parseFloat(currentFontSize, 10); var newFontSize = currentFontSizeNum*1.2; $('html').css('font-size', newFontSize); return false; }); // Decrease the font size(smaller font) $(".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; }); });
1 $(document).ready(function() { 2 $('a[href*=#]').click(function() { 3 if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') 4 && location.hostname == this.hostname) { 5 var $target = $(this.hash); 6 $target = $target.length && $target 7 || $('[name=' + this.hash.slice(1) +']'); 8 if ($target.length) { 9 var targetOffset = $target.offset().top; 10 $('html,body') 11 .animate({scrollTop: targetOffset}, 900); 12 return false; 13 } 14 } 15 }); 16 // how to use 17 // place this where you want to scroll to 18 19 // the link 20 go to top 21 });
1 $(document).ready(function() { 2 $().mousemove(function(e){ 3 //display the x and y axis values inside the div with the id XY 4 $('#XY').html("X Axis : " + e.pageX + " | Y Axis " + e.pageY); 5 }); 6 // how to use 7 8 9 });
$(document).ready(function() { if ($('#id').html()) { // do something } });
1 $(document).ready(function() { 2 $('#id').replaceWith(' 3I have been replaced4 5 '); 6 });
1 $(document).ready(function() { 2 window.setTimeout(function() { 3 // do something 4 }, 1000); 5 });
$(document).ready(function() { var el = $('#id'); el.html(el.html().replace(/word/ig, "")); });
1 $(document).ready(function() { 2 if ($('#id').length) { 3 // do something 4 } 5 });
1 $(document).ready(function() { 2 $("div").click(function(){ 3 //get the url from href attribute and launch the url 4 window.location=$(this).find("a").attr("href"); return false; 5 }); 6 // how to use 7 8 9 });
当改变Window大小时,在ID与Class之间切换
$(document).ready(function() { function checkWindowSize() { if ( $(window).width() > 1200 ) { $('body').addClass('large'); } else { $('body').removeClass('large'); } } $(window).resize(checkWindowSize); });
1 $(document).ready(function() { 2 var cloned = $('#id').clone(); 3 // how to use 4 5 6 });
1 $(document).ready(function() { 2 jQuery.fn.center = function () { 3 this.css("position","absolute"); 4 this.css("top", ( $(window).height() - this.height() ) / 2+$(window).scrollTop() + "px"); 5 this.css("left", ( $(window).width() - this.width() ) / 2+$(window).scrollLeft() + "px"); 6 return this; 7 } 8 $("#id").center(); 9 });
1 $(document).ready(function() { 2 $.extend($.expr[':'], { 3 moreThen1000px: function(a) { 4 return $(a).width() > 1000; 5 } 6 }); 7 $('.box:moreThen1000px').click(function() { 8 // creating a simple js alert box 9 alert('The element that you have clicked is over 1000 pixels wide'); 10 }); 11 });
1 $(document).ready(function() { 2 $("p").size(); 3 });
1 $(document).ready(function() { 2 $("ul").addClass("Replaced"); 3 $("ul > li").prepend("‒ "); 4 // how to use 5 ul.Replaced { list-style : none; } 6 });
1 //Example 1 2 3 9 10 // Example 2:(the best and fastest way) 11
1 $(document).ready(function() { 2 jQuery.fx.off = true; 3 });
1 $(document).ready(function() { 2 var $jq = jQuery.noConflict(); 3 $jq('#id').show(); 4 });
本文转自:http://www.admin10000.com/document/909.html