浏览器的另存为网页js代码

function runCode(obj) { 
var winname = window.open('', "_blank", ''); 
winname.document.open('text/html', 'replace'); 
winname.opener = null // 防止代码对父页面修改 
winname.document.write(obj.value); 
winname.document.close(); 
} 
function saveCode(obj) { 
var winname = window.open('', '_blank', 'top=10000'); 
winname.document.open('text/html', 'replace'); 
winname.document.write(obj.value); 
winname.document.execCommand('saveas','','code.htm'); 
winname.close(); 
} 

function oCopy(obj){ 
obj.select(); 
js=obj.createTextRange(); 
js.execCommand("Copy"); 
alert("另存为"); 
}