function openInnerWindow(window){
        var mask = document.createElement( "div" );
        mask.id="mask";
        mask.style.position="absolute";
        mask.style.filter="alpha(opacity=50)";
        mask.style.height=document.body.scrollHeight;
        mask.style.width=document.body.scrollWidth;
        mask.style.backgroundColor="gainsboro"
        document.body.insertAdjacentElement('afterBegin',mask);
        window.style.display="";
        window.style.top=document.body.scrollTop+document.body.clientHeight/2;
        window.style.left=(document.body.clientWidth-430)/2;
    }
    function cancel(window){
        document.body.removeChild(document.all("mask"));
        window.style.display="none";
    }