function popwindow(url,name,status,width,height) {

	//caculate center positon of the new window

     

    status=status+",left="+getLeftPosition(width)+",top="+getTopPosition(height);

    

    newwindow=window.open(url,name,status);

	if (window.focus) {newwindow.focus()}

	

	return false;

}

function getLeftPosition(width)

{

   return (screen.width-width)/2;

   

}



function getTopPosition(height)

{



   return topPosition=(screen.height-height)/2;

   

}



function openNewWindow(url) {

    //caculate center positon of the new window

     

   newwindow=window.open(url);

   if (window.focus) {

       newwindow.focus();    

   }

   return false;

}