var swin;
function openwin(w,h,scroll,resize,wname,pageurl){
	if(winclosecheck(swin)){
		win_cfg = 'toolbar=no,location=0,directories=no,status=no,menubar=0,scrollbars='+scroll+',resizable='+resize+',width='+w+',height='+h;
		swin = window.open(pageurl,wname,win_cfg);
		swin.focus();
	}
	else{
		swin.focus();
	}
}

function winclosecheck(targetwin) {
	var ua = navigator.userAgent
	if( !!targetwin ){
		if( ( ua.indexOf('Gecko')!=-1 || ua.indexOf('MSIE 4')!=-1 ) && ua.indexOf('Win')!=-1 ){
			return targetwin.closed;
		}
		else{
			return typeof targetwin.document  != 'object';
		}
	}
	else{
		return true;
	}
}