目录
1.对话框
var res= confirm("请选择确定和取消");
alert(res);
var aee=prompt("请输入一个数",9);2.open
<script type="text/javascript">
function init(){
var oBtn =document.getElementById("btn");
oBtn.onclick=function(){
open("http://www.baidu.com","百度");
}
}
</script>3.history对象
<script type="text/javascript">
//保存用户上网记录
//history.length,.back()后退，.forward(),前进，.go():0,重载。正数前进，负数后退
window.onload=function(){
var oBtn=document.getElementById("btn");
oBtn.onclick=function(){
alert(history.length);
}
var oForward=document.getElementById("forward");
oForward.onclick=function(){
history.forward();
}
var oBack=document.getElementById("back");
oBack.onclick=function(){
history.back();
}
var oGo=document.getElementById("go");
oGo.onclick=function(){
history.go(2);
}
}
</script>4.字符串实例
?id=5&search=ok
获取url中search，通过传入对应的key，返回key对应的value
例子：传入id，返回5
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script type="text/javascript">
/*?id=5&search=ok
获取url中search，通过传入对应的key，返回key对应的value
例子：传入id，返回5
*/
function getValue(search,key){
var start=search.indexOf(key);//返回第一次出现的位置，找不到就返回-1
if(start == -1){
return;
}else{
var end=search.indexOf("&",start);//第2个参数是查找的起始位置,O要大写
if(end==-1){
end=search.length;
}
}
var str=search.substring(start,end);//提取子字符串
// alert(str)
var arr=str.split("=");
return arr[1];
}
var search = "?id=5&search=ok";
alert(getValue(search,"id"));
alert(getValue(search,"search"));
</script>
</head>
<body>
</body>
</html>