function randomString(n){
var str="abcdefghijklmnopgrstuvwxyz9876543210";
var len=str.length;
var tmp="";
for(var i=0;i<n;i++){
tmp+=str.charAt(Math.floor(Math.random()*len))
}
return tmp
}
console.log(randomString(5));
function randomString(n){
var str="abcdefghijklmnopgrstuvwxyz9876543210";
var len=str.length;
var tmp="";
for(var i=0;i<n;i++){
tmp+=str.charAt(Math.floor(Math.random()*len))
}
return tmp
}
console.log(randomString(5));