var myarr = new Array();
for(var i=0;i<3;i++){
myarr[i] = new Array();
document.write("myarr["+i+"]的值为："+myarr[i] + '<br/>');
for(var j=0;j<6;j++){
myarr[i][j] = i * j ;
document.write("myarr["+i+"]["+j+"]"+ myarr[i][j] + '<br/>');
}
}
for(var i=0;i<3;i++){
myarr[i] = new Array();
document.write("myarr["+i+"]的值为："+myarr[i] + '<br/>');
for(var j=0;j<6;j++){
myarr[i][j] = i * j ;
document.write("myarr["+i+"]["+j+"]"+ myarr[i][j] + '<br/>');
}
}
//创建数组
var mya = new Array('*','**','***','','','','','');
mya[7]="****";
//显示数组长度
document.write("数组长度为"+mya.length+"<br/>");
//将数组内容输出，完成达到的效果。
for(var j,i=0;i<8;i++)
{
j=i+1;
mya[j]=mya[i]+"*";
document.write(mya[i]+"<br>");
}
var mya = new Array('*','**','***','','','','','');
mya[7]="****";
//显示数组长度
document.write("数组长度为"+mya.length+"<br/>");
//将数组内容输出，完成达到的效果。
for(var j,i=0;i<8;i++)
{
j=i+1;
mya[j]=mya[i]+"*";
document.write(mya[i]+"<br>");
}
标答也太死了啊~~
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>string对象 </title>
<script type="text/javascript">
var mystr="Hello World!"
document.write(mystr.indexOf("o",mystr.indexOf("o")+1));
</script>
</head>
<body>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>string对象 </title>
<script type="text/javascript">
var mystr="Hello World!"
document.write(mystr.indexOf("o",mystr.indexOf("o")+1));
</script>
</head>
<body>
</body>
</html>
2020-01-19
function daojishi()
{
var sn=document.getElementById("one").innerHTML
if(sn==0){
window.open("http://www.baidu.com")
}
setTimeout("daojishi()",1000);
sn--;
document.getElementById("one").innerText=sn;
}
function sea()
{
window.history.back();
}
{
var sn=document.getElementById("one").innerHTML
if(sn==0){
window.open("http://www.baidu.com")
}
setTimeout("daojishi()",1000);
sn--;
document.getElementById("one").innerText=sn;
}
function sea()
{
window.history.back();
}
//定义函数
function compare2(x,y){
if(x>y)
return x;
else if(x<y)
return y;
}
//函数体，判断两个整数比较的三种情况
var num1 = compare2(5,4);
var num2 = compare2(6,3);
//调用函数，实现下面两组数中，返回较大值。
document.write(" 5 和 4 的较大值是:"+num1+"<br>");
document.write(" 6 和 3 的较大值是:"+num2 );
function compare2(x,y){
if(x>y)
return x;
else if(x<y)
return y;
}
//函数体，判断两个整数比较的三种情况
var num1 = compare2(5,4);
var num2 = compare2(6,3);
//调用函数，实现下面两组数中，返回较大值。
document.write(" 5 和 4 的较大值是:"+num1+"<br>");
document.write(" 6 和 3 的较大值是:"+num2 );
<script type="text/javascript">
var availWidth = screen.availWidth;
var availHeight = screen.availHeight;
document.write("可用宽度：" + availWidth +"px" );
document.write("可用高度：" + availHeight +"px" );
</script>
var availWidth = screen.availWidth;
var availHeight = screen.availHeight;
document.write("可用宽度：" + availWidth +"px" );
document.write("可用高度：" + availHeight +"px" );
</script>
2019-12-30
<script type="text/javascript">
var height = screen.height;
var width = screen.width;
document.write( "屏幕宽度：" + width);
document.write( "屏幕高度：" + height);
</script>
var height = screen.height;
var width = screen.width;
document.write( "屏幕宽度：" + width);
document.write( "屏幕高度：" + height);
</script>
2019-12-30
练习的这个实现出来，我这样写也可以，还更简单一些，不过更这章的知识点没关系
<script type="text/javascript">
function replaceMessage(){
var a = document.getElementById("oldnode");
a.style.fontWeight = "normal";
a.style.fontStyle = "italic";
}
<script type="text/javascript">
function replaceMessage(){
var a = document.getElementById("oldnode");
a.style.fontWeight = "normal";
a.style.fontStyle = "italic";
}
2019-12-14
