chordimp的博客

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var a=prompt("请输入登陆邮箱");    function getyuming(a){        var pos=a.lastIndexOf("@");        document.write("登陆的邮箱域名是："+a.substr(pos+1)+"");        document.write("邮箱的用户名是："+a.slice(0,pos));

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onchange()#div {width: 300px;height: 300px;border: 2px solid gray;margin: 100px 0 0 200px;}window.onload = changcolor;function changcolor() {var a = document.getElementById('