Iframe 自适应高度（js）

• 兼容的Iframe自适应高度

    function setIframeHeight(id){          try{            var iframe = document.getElementById(id);            if(iframe.attachEvent){              iframe.attachEvent("onload", function(){                iframe.height =  iframe.contentWindow.document.documentElement.scrollHeight;              });              return;            }else{              iframe.onload = function(){                iframe.height = iframe.contentDocument.body.scrollHeight;              };              return;                            }              }catch(e){            throw new Error('setIframeHeight Error');          }        }