function random(){ var a = parseInt(Math.random()*100);
var b = a%4+1;
if(b==1){ document.scripts[0].src="/js/1.js";
}else if(b==2){ document.scripts[1].src="/js/2.js";
}else if(b==3){ document.scripts[2].src="/js/3.js";
}else if(b==4){ document.scripts[3].src="/js/4.js";
}
}还有一种也不行:
function random(){ var a = parseInt(Math.random()*100);
var b = a%4+1;
if(b==1){ document.getElementById("id").src="/js/1.js";
}else if(b==2){ document.getElementById("id").src="/js/2.js";
}else if(b==3){ document.getElementById("id").src="/js/3.js";
}else if(b==4){ document.getElementById("id").src="/js/4.js";
}
}javascript
var b = a%4+1;
if(b==1){ document.scripts[0].src="/js/1.js";
}else if(b==2){ document.scripts[1].src="/js/2.js";
}else if(b==3){ document.scripts[2].src="/js/3.js";
}else if(b==4){ document.scripts[3].src="/js/4.js";
}
}还有一种也不行:
function random(){ var a = parseInt(Math.random()*100);
var b = a%4+1;
if(b==1){ document.getElementById("id").src="/js/1.js";
}else if(b==2){ document.getElementById("id").src="/js/2.js";
}else if(b==3){ document.getElementById("id").src="/js/3.js";
}else if(b==4){ document.getElementById("id").src="/js/4.js";
}
}javascript
document.scripts这个
动态加载js请参见
http://www.iteye.com/topic/147810
var script = document.createElement("script");
script.type = "text/javascript";
script.src = url;
document.getElementsByTagName("head")[0].appendChild(script);
} function random() {
var a = parseInt(Math.random() * 100);
var b = a % 4 + 1;
addScript( "/js/" + b + ".js" )
}