急 js中发作不一样的随机数_Eclipse

急！急！ js中产生不一样的随机数！
如1-30之间，我想产生10个随机整数，但这10个（或15个）个数必须不一样，求高手解答~

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JScript code

<script type="text/javascript">var r=parseInt(Math.random()*30);var array=[];for(var i=0;i<11;i++){ var flag=0; do {  for(var j=0;j<array.length;j++)  {   if(array[j]==r) {flag=1;break;}  }  if(!flag)   {   array[array.length]=r;  }  else  {   r=parseInt(Math.random()*30);  } }while(!flag);}for(var j=0;j<array.length;j++) document.write(array[j]+" ");</script>
------解决方案--------------------
HTML code<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML> <HEAD>  <TITLE> New Document </TITLE>  <META NAME="Generator" CONTENT="EditPlus">  <META NAME="Author" CONTENT="">  <META NAME="Keywords" CONTENT="">  <META NAME="Description" CONTENT="">  <SCRIPT LANGUAGE="JavaScript">  <!--    function getNumb(){        var num = new Array();        for(var i = 0; i < 10; i++){            var val =  Math.ceil(Math.random() * 30);            var isEqu = false;            for(var idx in num){                if(num[idx] == val){isEqu = true; break;}            }            if(isEqu)                i--;            else                num[num.length] = val;        }        return num;    }    function test(){        alert(getNumb());    }  //-->  </SCRIPT> </HEAD> <BODY onload="test()">   </BODY></HTML>