![[求助] python 如何爬取 网页上调用JS函数打开的视频链接](/aiimages/%5B%E6%B1%82%E5%8A%A9%5D+python+%E5%A6%82%E4%BD%95%E7%88%AC%E5%8F%96+%E7%BD%91%E9%A1%B5%E4%B8%8A%E8%B0%83%E7%94%A8JS%E5%87%BD%E6%95%B0%E6%89%93%E5%BC%80%E7%9A%84%E8%A7%86%E9%A2%91%E9%93%BE%E6%8E%A5.png)
<html lang="en">
<head>
<meta charset="UTF-8">
<title>computer</title>
<script>
function compute(){
str1=Number(document.getElementById("txt1").value)
str2=Number(document.getElementById("txt2").value)
comp=document.getElementById("select").value
var result
switch(comp) {
case "+":
comp=str1+str2
break
case "-":
comp=str1-str2
break
case "*":
comp=str1*str2
break
case "/":
if(str2==0){
alert("除数不能为0！")
comp=''
}else{
comp=str1/str2
}
break
}
document.getElementById("result").value=comp
}
</script>
</head>
<body>
<input type="text" id="txt1"/>
<select name="method" id="select">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select>
<input type="text" id="txt2"/>
<input type="button" id="b1" value="等于" onclick="compute()" />
<input type="text" id="result"/>
</body>
</html>
这有何难？给你一个最简单的版本你自己去完善吧。
<head><script type="text/javascript">
<!--
function calc(){
var num1=+document.getElementById("num1").value
var s = document.getElementById("s").value
var num2 = +document.getElementById("num2").value
if(s=="+"){
alert(num1+num2)
} else if(s=="-"){
alert(num1-num2)
} else if(s=="*"){
alert(num1*num2)
} else if(s=="/"){
alert(num1/num2)
}
}
//-->
</script>
</head>
<body>
<input type="text" name="" id="num1"><input type="text" name=""id="s"><input type="text" name=""id="num2"><input type="button" value="Calc" onclick="calc()">
</body>
</html>
