iframe自动适应高度1

js:

function iFrameHeight() {
var ifm= document.getElementById("iframepage");
var subWeb = document.frames ? document.frames["iframepage"].document : ifm.contentDocument;
if(ifm != null && subWeb != null) {
ifm.height = subWeb.body.scrollHeight;
}
}

iframe:

下面的兼容性比较好：
/*兼容FF/IE9/IE8/IE7/IE6*/
function iframeResize(iframe) {
   try {
   //var iframe = document.getElementById("contentFrame"); //("contentFrame");
   var idocumentElement = iframe.contentWindow.document.documentElement;
   if (idocumentElement.scrollHeight > 560) {
   iframe.height -= 5;
   iframe.height = idocumentElement.scrollHeight;
   }
   else {
   iframe.height = 560;
   }
   }
   catch (e) {
   window.status = 'Error: ' + e.number + '; ' + e.description;
   }
   }

iframe: