<script src="/math.js"></script>

<script src="/d3.v3.min.js"></script>

<script src="/function-plot.js"></script>

<script src="/mathjax/MathJax.js?config=default"></script>

<h2 id="h2"> DrHuang First JavaScript 黄博士第一个程序

</h2>

<input id="guess"> <button onclick="Plot()" >plot画图</button>

<center>

<div id="plottext" name="plottext"></div><br>

<div id="plot" name="plot"></div><br>

</center>

​

<button onclick="myFunction()"> display time 显示时间 Change color 改变颜色

</button>

​

<button type="button"

onclick="setInterval('myFunction()',1000)">

auto refresh time 自动刷新时间 Change color 改变颜色

</button>

​

<script>

function myFunction() {

  var x = document.getElementById("h2");

  x.style.fontSize = "40px"; 

  x.style.color = "red"; 

  document.getElementById('demo').innerHTML = Date();

}

</script> 

​

<p id="demo"></p>

​

LaTeX is between $$ x^6 $$

​