/*
function iFrameHeight() {
var ifm= document.getElementById("myfame");
var subWeb = document.frames ? document.frames["iframepage"].document :
ifm.contentDocument;
if(ifm != null && subWeb != null) {
ifm.height = subWeb.body.scrollHeight;
}
};
//ifame高度自适应
function IFrameReSize(iframename) {
var pTar = document.getElementById(iframename);
if (pTar) { //ff
if (pTar.contentDocument && pTar.contentDocument.body.offsetHeight) {
pTar.height = pTar.contentDocument.body.offsetHeight;
} //ie
else if (pTar.Document && pTar.Document.body.scrollHeight) {
pTar.height = pTar.Document.body.scrollHeight;
}
}
};
//iframe宽度自适应
function IFrameReSizeWidth(iframename) {
var pTar = document.getElementById(iframename);
if (pTar) { //ff
if (pTar.contentDocument && pTar.contentDocument.body.offsetWidth) {
pTar.width = pTar.contentDocument.body.offsetWidth;
} //ie
else if (pTar.Document && pTar.Document.body.scrollWidth) {
pTar.width = pTar.Document.body.scrollWidth;
}
}
};*/
原文：http://www.cnblogs.com/doudou618/p/4601496.html