点击事件

var a = document.getElementById('anniu');

var c = document.getElementById('xianshi');

var d = document.getElementById('xianshia');

var e = document.getElementById('xianshis');

var b = document.getElementsByTagName('div');

var nam = 1;

a.onclick = function() {

if(nam == 1) {

b[0].style.display = 'none';

nam = 0;

} else {

b[0].style.display = 'block';

nam = 1;

}

}

c.onclick = function() {

b[0].style.backgroundColor = '#f00';

b[0].style.display = 'block';

}

d.onclick = function() {

b[0].style.borderRadius = '0%';

}

e.onclick = function() {

b[0].style.borderRadius = '50%';

}