sjiang2142的专栏

当页面img标签显示的图片不存在时，该js可以设置默认no-pic图片//设置默认图片 function setDefaultImage(){ var length = document.images.length; for(var i=0;i<length;i++){

//两个数比较大小不用逻辑判断，两个数相减后做逻辑移位求符号位，如果符号位是0则大于等于，如果符号位为1则小于 alert((65-5555)>>>63);

//位运算法 function swap(a,b) { a = a^b; b = a^b; a = a^b; return [a,b]; } alert(swap(5,9)); //加减法 function swap(a,b) { a = a-b; b = a+b; a = b-a; return [a,b]

function bubble_sort(arr){ for(var i=1;i<arr.length;i++){ for(var j=0;j<arr.length-i;j++){ if(arr[j]<arr[j+1]){ arr[j]=arr[j]^arr[j+1]; arr[j+1]=arr[j]^arr[j+1]; arr[j]=arr[j]

编码转换工具 //转换成ASCII码 function ascii(str) { return str.replace(/[^\u0000-\u00FF]/g, function($0) { return esca

function MessageBox(msg,title){ if(title==undefined){ title="系统提示"; } if(msg==undefined){ msg="提示信息"; } var divObj = documen

function Tag(){ this.id; this.name; this.style; this.src; this.title; this.pX; this.pY; this.pW; this.pH; this.content;

New Document #operPanel{ position: absolute; left: 5px; top: 5px; width:200px; height:700px; bord

Rays Drag Test function DragObj() { var flag=0;//0:no,1:yes var x=0; var y=0; } var dEvt = new DragObj(); function down(obj)

var easyTemplate = function(s,d){ if(!s){return '';} if(s!==easyTemplate.template){ easyTemplate.template = s; easyTemplate.aState

无标题文档 document.write(""); document.write(""); function writeIframe() { var strIframe = ""+ "*{font-size: 1

各位相加不进位，再加上进位值 function add(a,b){ if(b==0) return a; var sum = a^b; var carry = (a&b)<<1; return add(sum,carry); } alert(add(3,4));