var timeout;
var ie4=(navigator.appVersion.indexOf("MSIE")!=-1 && parseFloat(navigator.appVersion)>=4)?true:false;
var nn4=(navigator.appName=="Netscape" && parseFloat(navigator.appVersion)<5)?true:false;
var nn6=(navigator.appName=="Netscape" && parseFloat(navigator.appVersion)>=5)?true:false;

function OpenWindow(id,name,width,height,style) {

        if (style=="") style=',scrolling=yes,resizable=yes,scrollbars=yes,status=yes,statusbar=yes'

        var Left = (screen.width  - width) / 2 ;
        var Top  = (screen.height - height) / 2 ;

        window[id]=window.open('',name,'width='+width+',height='+height+',left='+ Left +',top='+ Top +style);
        window[id].focus();
        return false;
}