JavaScript设置IFrame高度自适应(兼容多浏览器)

function SetIFrameHeight(down) {

var Sys = {};

var ua = navigator.userAgent.toLowerCase();

var s;

(s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] :

(s = ua.match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] :

(s = ua.match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] :

(s = ua.match(/opera.([\d.]+)/)) ? Sys.opera = s[1] :

(s = ua.match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0;

var pTar = null;

if (document.getElementById) {

pTar = document.getElementById(down);

} else {

eval('pTar=' + down + ';');

}

pTar.style.display = "block";

if (Sys.ie) {

if (Sys.ie == '9.0') {

pTar.height = pTar.contentWindow.document.body.offsetHeight + 15 + "px";

pTar.width = pTar.contentWindow.document.body.scrollWidth + "px";

} else if (Sys.ie == '8.0') {

debugger;

pTar.height = pTar.Document.body.offsetHeight + 15 + "px";

pTar.width = pTar.Document.body.scrollWidth + "px";

} else {

pTar.height = pTar.Document.body.scrollHeight + 25 + "px";

pTar.width = pTar.Document.body.scrollWidth + "px";

}

}

if (Sys.firefox) {

pTar.height = pTar.contentDocument.body.offsetHeight + 15 + "px";

pTar.width = pTar.contentDocument.body.scrollWidth + "px";

}

if (Sys.chrome) {

pTar.height = pTar.contentDocument.body.offsetHeight;

pTar.width = pTar.contentDocument.body.scrollWidth;

}

if (Sys.opera) {

pTar.height = pTar.contentDocument.body.offsetHeight;

pTar.width = pTar.contentDocument.body.scrollWidth;

}

if (Sys.safari) {

if (pTar.contentDocument.body.offsetHeight <= '186') {

pTar.height = pTar.contentDocument.body.offsetHeight + 10;

} else {

pTar.height = pTar.contentDocument.body.offsetHeight;

}

pTar.width = pTar.contentDocument.body.scrollWidth;

}

}