<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<button onclick="fun(this)">clickMe</button>
<script type="text/javascript">
var flag = 1;
function fun(btn)
{
if(flag==1)
flag = 0;
btn.disabled = true;
}
</script>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<button onclick="fun(this)" id="bt">clickMe</button>
<script type="text/javascript">
var flag = 1;//改成0就是不能按window.onload = function()
{
var btn = document.getElementById("bt");
if(flag==1)
btn.disabled = false;
else
btn.disabled = true;
}
function fun(btn)
{
if(flag==1)
flag = 0;
btn.disabled = true;
}
</script>
</body>
</html>
var btvar = 1;
if(btvar==1){
bt = 0;
btname.disabled = true;
}
//btname是按钮名称
</script>