直接拿来用的15个jQuery代码片段

if (type == 'text' || type == 'password' || tag == 'textarea')
this.value = "";
// checkboxes and radios need to have their checked state cleared
// but should *not* have their 'value' changed
else if (type == 'checkbox' || type == 'radio')
this.checked = false;
// select elements need to have their 'selectedIndex' property set to -1
// (this works for both single and multiple select elements)
else if (tag == 'select')
this.selectedIndex = -1;
});
};

11.预防对表单进行多次提交

$(document).ready(function() {
 $('form').submit(function() {
  if(typeof jQuery.data(this, "disabledOnSubmit") == 'undefined') {
   jQuery.data(this, "disabledOnSubmit", { submited: true });
   $('input[type=submit], input[type=button]', this).each(function() {
    $(this).attr("disabled", "disabled");
   });
   return true;
  }
  else
  {
   return false;
  }
 });
}); 

12.动态添加表单元素

//change event on password1 field to prompt new input
$('#password1').change(function() {
    //dynamically create new input and insert after password1
    $("#password1").append("");
});

 

13.让整个Div可点击

blah blah blah. link
The following lines of jQuery will make the entire div clickable: $(".myBox").click(function(){ window.location=$(this).find("a").attr("href"); return false; });  

14.平衡高度或Div元素

var maxHeight = 0;
$("div").each(function(){
  if ($(this).height() > maxHeight) { maxHeight = $(this).height(); }
});
$("div").height(maxHeight);

15. 在窗口滚动时自动加载内容

var loading = false;
$(window).scroll(function(){
  if((($(window).scrollTop()+$(window).height())+250)>=$(document).height()){
    if(loading == false){
      loading = true;
      $('#loadingbar').css("display","block");
      $.get("load.php?start="+$('#loaded_max').val(), function(loaded){
        $('body').append(loaded);
        $('#loaded_max').val(parseInt($('#loaded_max').val())+50);
        $('#loadingbar').css("display","none");
        loading = false;
      });
    }
  }
});
$(document).ready(function() {
  $('#loaded_max').val(50);
}); 

本文收集的这15段非常实用的jQuery代码片段，你可以直接复制黏贴到代码里，但请开发者注意了，要理解代码再使用哦。