比如下面:(我想根据下拉框的选项自动生成代码(2个字母和4个数字的结合),应该怎么写js)
代号:
类别:
水果
电器
饮料
比如下面:(我想根据下拉框的选项自动生成代码(2个字母和4个数字的结合),应该怎么写js)
var chars = "ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
var string_length = 6;
var randomstring = '';
var charCount = 0;
var numCount = 0;
for (var i=0; i
if((Math.floor(Math.random() * 2) == 0) && (numCount = 4)) {
var rnum = Math.floor(Math.random() * 10);
randomstring += rnum;
numCount += 1;
} else {
var rnum = Math.floor(Math.random() * chars.length);
randomstring += chars.substring(rnum,rnum+1);
charCount += 1;
}
}
alert(randomstring);