数组随机取值
function load(minnum,maxnum){
var choice = maxnum - minnum +1;
var a = Math.floor(Math.random()*choice + minnum);
return a;
}
var groups = ['0','1','2','3','4'];
var b = groups[load(0,groups.length -1)];
alert(b);
var choice = maxnum - minnum +1;
var a = Math.floor(Math.random()*choice + minnum);
return a;
}
var groups = ['0','1','2','3','4'];
var b = groups[load(0,groups.length -1)];
alert(b);