JS function for random no between two nos

function getRanondom(from,to)
{
if(from >to)
{
alert("Error:: From Should Greater Then To")
return false;
}
while(true)
{
var no=Math.random()*to;
if(no>from && no<to)
{
return no;
break;
}else{ continue; }
}
}
How To Use
var no =getRanondom(20,28);