最赞回答 / arlenhui
function random(x, y) {var a = Math.random()*(y-x)+x;return a;}//获取从x到y的随机数
2015-07-13
最新回答 / inro
这样理解就很容易了: 字符串用split进行分割以后所以就成为了一个数组，例如：var mychar="hello,javascript";进行分割以后就变成了这样一个样子：["h","e","l","l","0",",","j","a","v","a","s","c","r","i","p","t"]定义数组的时候: var myarry=["h","e","l","l","0",",","j","a","v","a","s","c","r","i","p","t"]所以在用document.writ...
2015-07-13
最新回答 / arlenhui
window.onload = function(){document.getElementById('box').style.display = 'none';}
2015-07-13
最赞回答 / youngmings
把mynum=mynum+1放到document前面，就会先把5加了1后再显示出来就变成6了。mynum去到while（mynum<=5）这一步骤时值为5，进去后先加了1再document.write()出来就变成6了。mynum++等同于”mynum=mynum+1“，不要写成mynum=mynum++，写mynum++就好了。
2015-07-09