移动网站开发中常用的10段JavaScript代码

1、如果网页是在iPhone或Android浏览器中查看，则在主体元素中添加“iPhone”或“Android” 类名

    if (navigator.userAgent.match(/iPhone/i)) {          $('body').addClass('iPhone');      } else if (navigator.userAgent.match(/Android/i)) {              $('body').addClass('Android');      } 

iPhone用户浏览示例：

Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1A537a Safari/419.3
Mozilla/5.0 (iPhone; U; XXXXX like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1A477d Safari/419.3

Android用户浏览示例：

Mozilla/5.0 (Linux; U; Android 2.2; en-us; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1
Mozilla/5.0 (Linux; U; Android 1.6; en-gb; Dell Streak Build/Donut AppleWebKit/528.5+ (KHTML, like Gecko) Version/3.1.2 Mobile Safari/ 525.20.1
Mozilla/5.0 (Linux; U; Android 2.1-update1; de-de; HTC Desire 1.19.161.5 Build/ERE27) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17
Mozilla/5.0 (Linux; U; Android 2.2; en-us; DROID2 GLOBAL Build/S273) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1
Mozilla/5.0 (Linux; U; Android 2.2; en-gb; GT-P1000 Build/FROYO) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1
Mozilla/5.0 (Linux; U; Android 2.1-update1; de-de; E10i Build/2.0.2.A.0.24) AppleWebKit/530.17 (KHTML, like Gecko) Version/4.0 Mobile Safari/530.17

2、移除浏览器地址栏

window.scrollTo(0, 1); 

3、防止网页触摸滚动

    notouchmove = function(event) {          event.preventDefault();      }      <div data-role="page" id="home" ontouchmove="notouchmove(event);">      ...      </div> 

4、当横向浏览时显示信息

    var updateorientation = function (){          var classname = '',          top = 100;          switch(window.orientation){              case 0:              classname += "normal";              break;                   case -90:              classname += "landscape";              break;                   case 90:              classname += "landscape";              break;               }               if (classname == 'landscape') {              if ($('#overlay').length === 0) {                  window.scrollTo(0, 1);                  $('body').append('<div id="overlay" style="width: 100%; height:' + $(document).height() + 'px"><span style="top: ' + top + 'px">Landscape view is not supported for this page.</span></div>');              }          } else {              $('#overlay').remove();          }      };      Usage:           var supportsOrientationChange = "onorientationchange" in window,      orientationEvent = supportsOrientationChange ? "orientationchange" : "resize";           window.addEventListener(orientationEvent, function() {          updateorientation();      }, false);  

5、显示部分描述信息，当点击时显示完整信息 

    var truncatedesc = function(trunc, len) {          if (trunc) {            var org = trunc;                 if (trunc.length > len) {              trunc = trunc.substring(0, len);              trunc = trunc.replace(/w+$/, '');                   trunc = '<span class="truncated">' + trunc;              trunc += '<strong class="more-description">...</strong></span>';              trunc += '<span class="original" style="display: none;">' + org + '</span>';            }                 $('.truncated').live("touchstart touchend", function() {              $(this).closest('div').find('.original').show();              $(this).closest('div').find('.truncated').hide();              return false;            });                 return trunc;          }      };           Usage:           truncatedesc(item.description, 100); 

6、收到成功的Ajax请求时，重定向到另一个页面(jQuery mobile)

    var ajaxurl = ‘http://…’; // Your web service URL           $.ajax({          url: ajaxurl,          type: 'GET',          processData: false,          contentType: "application/json",          dataType: "jsonp",          success: function(data) {              $.mobile.changePage("results.html");          },          error: function() {              alert('Error!');          }      }); 

7、从列表视图的链接中删除活动状态(jQuery mobile)

$('div').live('pageshow', function (event, ui) {      $('[data-role=listview] li').removeClass("ui-btn-active");  });

8、从下拉选择中禁用默认的jQuery mobile样式(jQuery mobile)

    $(document).bind("mobileinit", function(){           $.mobile.page.prototype.options.keepNative = "select";      }); 

9、动态更新列表视图(jQuery mobile)

    var output  = '<li><img src="' + item.image + '" alt="' + item.title + '" />';      output += '<h3><a href="' + item.url + '">' + item.title + '</a></h3>';      output += '</li>';              $('#mylistul').append(output).listview('refresh');  

10、动态添加表单输入和应用默认样式(jQuery mobile)

    var html = '<input type="search" name="suburb" id="suburb" placeholder="Enter suburb" />';      $('#searchform').append(html);      $('#suburb').textinput();