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<html><head> <meta charset="utf-8"> <title>JS Bin</title></head><body><input type="text" id="text" value="ok"/><input type="button" value="生成随机数" onclick="my_ran(3,2,20)" id="cre" /><input type="button" value="清空" onclick="del()" /></body></html>function my_ran(n,min,max){ var arr=[]; for(i=0;i<n;i++){ arr[i]=parseInt(Math.random()*(max-min+1)+min); } for(i=0;i<n;i++){ for(j=i+1;j<n;j++){ if(arr[i]==arr[j]){ my_ran(n,min,max); return fault; } } } document.getElementById("text").value=arr;}function del(){ document.getElementById("text").value="";}
Output
300px
300px
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