Easyui window window title horizontal bar shielding and centering algorithm

function openWin(url){
    var browserWidth =  document.body.clientWidth;
    var browserHeiht =  document.body.clientHeight;
    var IframWidth = browserWidth-browserWidth/9;
    var IframHeight = browserHeiht-browserHeiht/5;
    var IframTop = (browserHeiht-IframHeight)/2;
    var IframLeft = (browserWidth-IframWidth)/2;
    $('#win').window({
        title:"Page Designer",
        width:IframWidth,
        height:IframHeight,
        top:IframTop,
        left:IframLeft,
        modal:true,
        resizable:false,
        draggable:true,
        // closable:false,
        collapsible:false,
        minimizable:false,
        maximizable:false
    });
    $('#win').window('open');
    $('#winIframe').attr('src', url)
}