项目主题学习：js

禁止输入：

<script language="JavaScript">

window.onload=function(){

document.getElementById('country').disabled=true;

document.getElementById('blank').disabled=true;

}

function display(flg){

if(flg==1){

document.getElementById('country').disabled=false;

document.getElementById('blank').disabled=false;

}else{

document.getElementById('country').disabled=true;

document.getElementById('blank').disabled=true;

}

}

</script>

添加一个onclick(display(flg))

静止回退

<script language="JavaScript">

javascript:window.history.forward(1);

</script>