function showtips(url,width,height){
    if(document.getElementById("dhtipsiframe")==null){
        var iframe = document.createElement("IFRAME");
        iframe.id = "dhtipsiframe";
        iframe.style.position = "absolute";
        iframe.style.left = 0;
        iframe.style.top = 0;
        iframe.style.width = (document.body.scrollWidth>document.body.offsetWidth)?document.body.scrollWidth:document.body.offsetWidth;
        iframe.style.height = (document.body.scrollHeight>document.body.offsetHeight)?document.body.scrollHeight+20:document.body.offsetHeight;
        iframe.src=url;
        var div = document.createElement("DIV");
        div.id = "dhtipsdiv";
        div.oncontextmenu = function(){return false}
        div.onselectstart = function(){return false}
        with(div.style)
        {
            position = "absolute";
            left = 0;
            width = (document.body.scrollWidth>document.body.offsetWidth)?document.body.scrollWidth:document.body.offsetWidth;
            height = (document.body.scrollHeight>document.body.offsetHeight)?document.body.scrollHeight+20:document.body.offsetHeight;
            top = 0;
        }
        var div2 = document.createElement("DIV");
        div2.id = "dhtipscontent";
        div2.style.position = "absolute";
        div2.style.width=width;
        div2.style.left = document.body.offsetWidth/2-150+document.body.scrollLeft;
        div2.style.top = document.body.offsetHeight/2-150+document.body.scrollTop;
        div2.innerHTML = "<div class=\"tipsdiv\" style=\"height: "+height+";\"><iframe src="+url+" allowTransparency=\"true\" frameborder=\"0\"  width=\"100%\" height=\"100%\" scrolling=\"no\"></iframe></div><div class=\"closediv\"><input type=\"button\" class=\"closebtn\" value=\"关闭\" onclick=\"document.body.style.overflow='auto';document.getElementById('dhtipsiframe').style.display='none';document.getElementById('dhtipsdiv').style.display='none';document.getElementById('dhtipscontent').style.display='none';\" /></div>";
        div2.oncontextmenu = function(){return false}
        document.body.appendChild(iframe);
        document.body.appendChild(div);
        document.body.appendChild(div2);
    }
    else{
        document.getElementById("dhtipsiframe").style.display = "block";
        document.getElementById("dhtipsdiv").style.display = "block";
        document.getElementById("dhtipscontent").style.display = "block";
        document.getElementById("dhtipscontent").innerHTML = "<div class=\"tipsdiv\" style=\"height: "+height+";\"><iframe src="+url+" allowTransparency=\"true\" frameborder=\"0\"  width=\"100%\" height=\"100%\" scrolling=\"no\"></iframe></div><div class=\"closediv\"><input type=\"button\" class=\"closebtn\" value=\"关闭\" onclick=\"document.body.style.overflow='auto';document.getElementById('dhtipsiframe').style.display='none';document.getElementById('dhtipsdiv').style.display='none';document.getElementById('dhtipscontent').style.display='none';\" /></div>";
        document.getElementById("dhtipscontent").style.left = document.body.offsetWidth/2-150+document.body.scrollLeft;
        document.getElementById("dhtipscontent").style.top = document.body.offsetHeight/2-150+document.body.scrollTop;
    }
    var l = document.body.scrollLeft;
    var t = document.body.scrollTop;
    document.body.style.overflow = "hidden";
    document.body.scrollLeft = l;
    document.body.scrollTop = t;
}
function hiddenIframe()
{
    if(parent.document.getElementById("dhtipsiframe")!=null)
    {
        parent. document.body.style.overflow='auto';
        parent.document.getElementById('dhtipsiframe').style.display='none';
        parent.document.getElementById('dhtipsdiv').style.display='none';
        parent.document.getElementById('dhtipscontent').style.display='none';
    }
}