无法将js文件中的文本添加到iframe中的src

Question

如何将js文件中的文本添加到iframe中的src 并且不会是另一个iframe中的相同文本

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var games = new Array ();
games[0] = "mhgxcdufRbE?rel=0&showinfo=0";
games[1] = "jrndhugilod?rel=0&showinfo=0";
games[2] = "oloprokbanse?rel=0&showinfo=0";
games[3] = "nfbeuujshre?rel=0&showinfo=0";
games[4] = "sd54ddsaegdd?rel=0&showinfo=0";
games[5] = "h5gffy73jssa?rel=0&showinfo=0";
games[6] = "ffa87gb3n21s?rel=0&showinfo=0";
var i = Math.floor(7*Math.random())

document.write(games[i]);

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<iframe src="https://www.youtube.com/embed/ + games[i]" width="283" height="242.5" frameborder="0" allowfullscreen></iframe>

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Answer 1

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var games = [];
games[0] = "mhgxcdufRbE?rel=0&showinfo=0";
games[1] = "jrndhugilod?rel=0&showinfo=0";
games[2] = "oloprokbanse?rel=0&showinfo=0";
games[3] = "nfbeuujshre?rel=0&showinfo=0";
games[4] = "sd54ddsaegdd?rel=0&showinfo=0";
games[5] = "h5gffy73jssa?rel=0&showinfo=0";
games[6] = "ffa87gb3n21s?rel=0&showinfo=0";

var i = Math.floor( 7 * Math.random() ),
	iFrame = document.getElementById('iFrame').src = 'https://www.youtube.com/embed/' + games[i];

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<iframe id="iFrame" src="<INSERT DEFAULT URL HERE?>" width="283" height="242.5" frameborder="0"></iframe>

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另外fiddle

仅使用随机网址设置<iframe> src 。