解决iframe高度问题

1

  function calcPageHeight(doc) {
    var cHeight = Math.max(doc.body.clientHeight, doc.documentElement.clientHeight)
    var sHeight = Math.max(doc.body.scrollHeight, doc.documentElement.scrollHeight)
    var height  = Math.max(cHeight, sHeight)
    var height1 = height+430
    return height1
}
//根据ID获取iframe对象
var ifr = document.getElementById('mainFrame')
ifr.onload = function() {
    //解决打开高度太高的页面后再打开高度较小页面滚动条不收缩
    ifr.style.height='0px';
    var iDoc = ifr.contentDocument || ifr.document
    var height = calcPageHeight(iDoc)
    ifr.style.height = height + 'px'
} 

2

function iframeH(){
        //设置iframe高度
        parent.document.getElementById("mainFrame").height=0+"px";
        parent.document.getElementById("mainFrame").style.height = "";
        var h = $(document.body).height() + 120;
        parent.document.getElementById("mainFrame").height = h;
    }