1 <input type="text" name="word" value=‘请输入关键字‘ style="color:#ccc;" /> 2 <script> 3 /* 4 *清除输入框默然提示文字 5 */  6 jQuery.focusblur = function(focusid,focusColor,blurColor) { 7     var focusblurid = $(focusid); 8     var defval = focusblurid.val(); 9     focusblurid.focus(function(){10         var thisval = $(this).val();11         if(thisval==defval){12             $(this).val("");13             $(this).css("color",focusColor);14         }15     });16     focusblurid.blur(function(){17         var thisval = $(this).val();18         if(thisval==""){19             $(this).val(defval);20             $(this).css("color",blurColor);21         }else{22             $(this).css("color",focusColor);23         }24     });25     26 };27 28 $(document).ready(function(){29     //清除name=‘world‘的input里的默认提示文字30     $.focusblur("[name=‘word‘]","#333","#ccc");31 32 })33 </script>

 1 <!-- 返回顶部 --> 2 <style> 3 #gotop{display:none; width:80px; height:30px; line-height:30px; text-align:center; border:1px solid #dedede; background-color:#f8f8f8; cursor:pointer; 4         position:fixed; bottom:40px; right:20px; z-index:99999; 5 } 6 </style> 7 <div id="gotop">gotop</div> 8 <script type=‘text/javascript‘> 9   var backTop=function (btnId){10         var btn=document.getElementById(btnId);11         var d=document.documentElement;12         var b=document.body;13         window.onscroll=set;14         btn.onclick=function (){15             btn.style.display="none";16             window.onscroll=null;17             this.timer=setInterval(function(){18                 d.scrollTop-=Math.ceil((d.scrollTop+b.scrollTop)*0.1);19                 b.scrollTop-=Math.ceil((d.scrollTop+b.scrollTop)*0.1);20                 if((d.scrollTop+b.scrollTop)==0) clearInterval(btn.timer,window.onscroll=set);21             },10);22         };23         function set(){btn.style.display=(d.scrollTop+b.scrollTop>800)?‘block‘:"none"} //滚动的高度大于800px时才显示24     };25     backTop(‘gotop‘);26 </script>27 <!-- 返回顶部END -->

 1 /* 2 *去除数组里的重复项 3 */ 4 function uniQueue(array){  5   var arr=[];  6   var m;  7   while(array.length>0){  8       m=array[0];  9       arr.push(m); 10       array=$.grep(array,function(n,i){ 11       return n==m; 12       },true); 13   } 14   return arr; 15 }16 var testArr=[3,3,2,1,5,5];17 alert(testArr);                //[3,3,2,1,5,5]18 alert(uniQueue(testArr));    //[3,2,1,5]

 1 /* 2 * 冒泡排序 3 */ 4 function bubbleSort(arg){ 5     return bubbleSortTemp(arg.arr, 6                    arg.order || "asc"); 7 } 8 function bubbleSortTemp(arr,order){ 9     if(!(arr instanceof Array)) return false;         10     if(order=="asc"){          //asc:升序11         for(var i=0;i<arr.length;i++){12             for(var j=i+1;j<arr.length;j++){13                 if(arr[i]>arr[j]){14                     var temp=arr[i];15                     arr[i]=arr[j];16                     arr[j]=temp;17                 }18             }19         }20         return arr;21     }else if(order=="desc"){   //desc:降序22         for(var i=0;i<arr.length;i++){23             for(var j=i+1;j<arr.length;j++){24                 if(arr[i]<arr[j]){25                     var temp=arr[i];26                     arr[i]=arr[j];27                     arr[j]=temp;28                 }29             }30         }31         return arr;32     }else{33         return false;34     }35 }36 //具体例子如下37 var testArr=[2,4,5,1,3,6,8,7];38 alert(testArr);                                //[2,4,5,1,3,6,8,7]39 alert(bubbleSort({arr:testArr,order:"desc"})); //[8,7,6,5,4,3,2,1]40 alert(bubbleSort({arr:testArr,order:"asc"}));  //[1,2,3,4,5,6,7,8]41 alert(bubbleSort({arr:testArr}));               //[1,2,3,4,5,6,7,8]

 1 /* 2 *把冒泡排序封装成prototype原型对象函数 3 */ 4 Array.prototype.asc=function(){ //升序排序 5     for(var i=0;i<this.length;i++){ 6         for(var j=i+1;j<this.length;j++){ 7            if(this[i]>this[j]){ 8               var temp=this[i]; 9               this[i]=this[j];10               this[j]=temp;11             }12         }13     }14     return this;15 }16 Array.prototype.desc=function(){//降序排序17     for(var i=0;i<this.length;i++){18         for(var j=i+1;j<this.length;j++){19            if(this[i]<this[j]){20               var temp=this[i];21               this[i]=this[j];22               this[j]=temp;23             }24         }25     }26     return this;27 }28 //具体例子如下29 var testArr=[2,4,5,1,3,6,8,7];30 alert(testArr.asc());  //[1,2,3,4,5,6,7,8]31 alert(testArr.desc()); //[8,7,6,5,4,3,2,1]

 1  if (navigator.appName == ‘Microsoft Internet Explorer‘) {   //让ie支持getElementsByClassName方法 2         document.getElementsByClassName = function() {    3             var tTagName = "*";    4             if (arguments.length > 1) {    5                 tTagName = arguments[1];    6             }    7             if (arguments.length > 2) {    8                 var pObj = arguments[2]    9             } else {   10                 var pObj = document;   11             }   12             var objArr = pObj.getElementsByTagName(tTagName);   13             var tRObj = new Array();   14             for ( var i = 0; i < objArr.length; i++) {   15                 if (objArr[i].className == arguments[0]) {   16                     tRObj.push(objArr[i]);   17                 }   18             }   19             return tRObj;   20         }   21  }