javascriptone / 憋错料

myName=new Object();
myName.first="li";
myName.last="jin";
myName.age=19;
document.write(" "+myName.first+" is "+myName.age+" years old. jin的字符串长度是"+myName.last.length+"转换成大写"+myName.first.toUpperCase()+myName.last.toUpperCase());

function add(name,job){
alert("Welcome "+name+" ,the "+job);
}

function cat(a,b){
return a*b;
}
document.getElementById("logic").innerHTML=cat(3,5);
var txt1=" What a very"
var txt2="nice day!"
var txt3=txt1+" "+txt2;
document.write(txt3);

x=5+5;
document.write(x);
document.write(" "); //10
x="5"+"5";
document.write(x);
document.write(" "); //55
x=5+"5";
document.write(x);
document.write(" ");//55
x="5"+5;
document.write(x);
document.write(" ");//55

//星期几
function week(){
 var x;
 var d=new Date().getDay();
 switch(d){
 case 0:x="Today is Sunday.";break;
 case 1:x="Today is Mon.";break;
 case 2:x="Today is Tues.";break;
 case 3:x="Today is Wed.";break;
 case 4:x="Today is Thur.";break;
 case 5:x="Today is Fri.";break;
 case 6:x="Today is Sat.";break;
 }
 document.getElementById(‘weeks‘).innerHTML=x;
}
cars=["BWM","VOLVE","SAAB","FORD"];
var i=0;
while(cars[i]){
 document.write(cars[i]);
 i++;
}
 document.write(" ");
var j=0;
for(;cars[j];){
 document.write(cars[j]);
 j++;
}
function some(){
 try{
 adddlert("Welcome guest!");
 }
 catch(a){
 txt="页面有一个错误\n\n"+"错误描述："+a.message+"\n\n"+"点击继续。"
 alert(txt);
 }
}
function test(){
 try{
 var x=document.getElementById(‘write‘).value;
 if(x=="") throw "值为空";
 if (isNaN(x)) throw "不是数字";
 if (x>10) throw "太大";
 if(x<5) throw "太小";
 }
 catch(err){
 var y=document.getElementById(‘test‘);
 y.innerHTML="错误："+err+"。";
 }

}
//表单验证必填（或必选）项目
function validate_required(field,alerttxt){
 with(field)
 {
 if(value==null||value==""){
 alert(alerttxt);
 return false;
 }
 else{
 return true;
 }
 }
}
function validate_form(thisform){
 with(thisform){
 if(validate_required(email,"Email must be filled out!")==false){
 email.focus();
 return false;
 }
 }
}
//邮箱验证
function validate_emaile(field,alerttxt)
{
with (field)
{
apos=value.indexOf("@")
dotpos=value.lastIndexOf(".")
if (apos<1||dotpos-apos<2)
{alert(alerttxt);return false}
else {return true}
}
}

// var color=‘blue‘;
// function changeColor(){
// if (color===‘blue‘) {
// color="red";
// }else{
// color=‘red‘;
// };
// }
// changeColor();
// document.write(" "+color);

clothes[clothes.length]="black";
 document.write(""+clothes[3]+"");
 if(Array.isArray(clothes)){
 document.write("hello!");
 }

//Date


 var stop=Date.now();
 var time=stop-start;
 document.write(""+time+"");

//正则表达式
   var text = "000-00-0000";
   var pattern = /\d{3}-\d{2}-\d{4}/;
   if(pattern.test(text)){
       document.write("正则表达式哦")
   }

//高端函数
 function createComparisonFunction(propertyName){
 return function(object1,object2){
 var value11=object1[propertyName];
 var value22=object2[propertyName];
 if(value11<value22){
 return -1;
 //return value11-value22;
 }else if(value11>value22){
 return 1;
 }
 else{
 return 0;
 }
 };
 }

var data = [{name:"zhang",age:12},{name:"li",age:14}];
   data.sort(createComparisonFunction("name"));
   document.write(data[0].name);
   data.sort(createComparisonFunction("age"));
   document.write(data[0].age);

//阶乘函数
 function back(num){
 if(num<=1){
 return num;
 }else{
 return num*back(num-1);
 }
 }
 document.write("5的阶乘是"+back(5)+"");
 function back(num){
 if(num<=1){
 return num;
 }else{
 return num*arguments.callee(num-1);
 }
 }
 document.write("5的阶乘是"+back(5)+"");

window.page="red";
   var o = {page:"blue"};
   function sayPage(){
       document.write(this.page);
   }
   sayPage();//red
   o.sayPage=sayPage;
   o.sayPage();//blue

function outer(){
inner();
}

function inner(){
 document.write(""+inner.caller+"");
 document.write(""+arguments.callee.caller+"");
 }
 outer();
//apply
 function summ(num1,num2){
 return num1+num2;
 }

function callSum1(num1,num2){
return summ.apply(this,arguments)
}

function callSum2(num1,num2){
       return summ.apply(this,[num1,num2]);    //20
       //return summ(num1,num2);         //20
   }
   document.write(callSum1(10,10));
   document.write(callSum2(10,10));

//call
   window.page="red";
   var o = {page:"blue"};
   function sayPage(){
       document.write(this.page);
   }
   sayPage();//red
   sayPage.call(this); //red
   sayPage.call(window); //red
   sayPage.call(o); //blue
   // var pages=sayPage.call(o);
   // pages();             //blue
   var pages=sayPage.bind(o);
   pages();             //blue

//基本包装类型
 var s1="some text";
 var s2=s1.substring(2);
 s1=null;
 document.write(""+s1+""); //some text
 document.write(""+s2+""); //me text

 var obj=new Object("some text");
 document.write(""+obj+""); //some text
 document.write(obj instanceof String); //true

var look="25";
 var looks=Number(look); //数字 25 Number为转型函数
 document.write(""+typeof looks+""); //number
 //区分
 var looks2=new Number(look); //构造了新函数
 document.write(""+typeof looks2+""); //object

时间： 2024-10-12 22:04:10

javascriptone

javascriptone的相关文章

Javascript-one