javascript - generate two arrays of randoms between an interval -

i'd use function generate 2 arrays of same length values of first , second array shouldnt duplicates , neither values in first array shall not in second one.

what i've tried far:

function generatesiruri(width){     var exists = false;         for(var = 0; < width; i++){             var randomnumber = math.floor(math.random()*101);             var secondrandomnumber = math.floor(math.random()*101);              if(sir1[i] == randomnumber && sir2[i] == secondrandomnumber && randomnumber == secondrandomnumber && sir1[i] == secondrandomnumber){                 exists = true;                 return;             }              if(!exists){                 sir1.push(randomnumber);                 sir2.push(secondrandomnumber);             }         }             sortascending(sir1);     sortascending(sir2); }  function sortascending(array){     var sort;         for(i = 0; < array.length; i++){             for(var j = 0; j < array.length; j++){                 if(array[j] > array[j + 1]){                     sort = array[j];                     array[j] = array[j + 1];                     array[j + 1] = sort;                 }             }         }     return; } 

also, if have better option sort these arrays sortascending function , better option of if condition in generatesiruri please suggest. can't see better option now. thx!

do this:

    while(sir1.length < width) {         var randomnumber = math.floor(math.random()*101);         if (sir1.indexof(randomnumber) == -1)             sir1.push(randomnumber);     }      while(sir2.length < width)  {         var randomnumber = math.floor(math.random()*101);         if ((sir2.indexof(randomnumber) == -1) && (sir1.indexof(randomnumber) == -1))             sir2.push(randomnumber);     } 

this way, you're first filling sir1 unique values , separately filling sir2 unique values not in sir1.