iframe用js设定自定义高度

function SetWinHeight(obj){
    var win=obj;
    if (document.getElementById){
        if (win && !window.opera){
            if (win.contentDocument && win.contentDocument.body.offsetHeight){
　　　　　　　　　　win.height = win.contentDocument.body.offsetHeight;
            }
            else if(win.Document && win.Document.body.scrollHeight){
                win.height = win.Document.body.scrollHeight;
            }
        }
    }
}

<iframe width="100%" height="500" id="win" name="win" onload="Javascript:SetWinHeight(this)" frameborder="0" scrolling="no" src="default.html"></iframe>