<button style=" display:block; padding:10px 20px; margin-top:10px;" onclick="infotext()">按鈕</button>
<script>
var text=["妳好","他好","我好","大家好","其他內容1","其他內容2","其他內容3","其他內容4","其他內容5"]
function infotext(){
var num=randomNum(7,text.length);
var texts='';
for(var i=0;i<num.length;i++){
texts+=text[num[i]]+"\r\n";
}
document.getElementById("text").value=texts;
}
//生成ranNum個0到arrLength-1不重復的隨機數
function randomNum(ranNum,arrLength){
if(ranNum>arrLength){alert("您生成的個數不能大於數組長度!請重新設置參數!");return;}
var num=new Array()
for(var i=0;i<ranNum;i++){
var ran=Math.floor(Math.random() * arrLength);
if(num.indexOf(ran)<0){num[i] =ran;}
else{i--;}
}
return num;
}
</script>