<input type=button onclick="delRemark()" value=去掉注释>
<script>
function delRemark()
{
var a=hello.innerHTML;
beforeDel.innerText="去注释前\n"+a;
alert("注释前\n"+a);
a=a.replace(/\/\/.*\n+/g,"\n");
alert("去掉第一种注释后\n"+a);
var b=a.split("\/\*");
var c=/\*\//i;
for (var i=0;i<b.length;i++)
{
if (c.test(b[i]))
a=a.replace("\/\*"+b[i].substring(0,b[i].indexOf("\*\/",0)+2),"\n");
}
alert("去掉第二种注释后\n"+a);