var height=0;
var width=0;
var left=0;
var top=0;
var path="http://www1.hkma.org.hk/portal/ad/popup/popUp";
      function setWindowPosition()
      {
        if('Custom' == 'Custom')
          {
           left=0;
           top=0;
            }
        else{
          if('Custom' == 'Middle Center')
            {left=screen.width/2-415/2;
             top=screen.height/2-345/2;
            }
           if('Custom' == 'Top Center')
            {left=screen.width/2-415/2;
             top=0;
            }
           if('Custom' == 'Right Top')
            {left=screen.width-415-10;
             top=0;
            }
           if('Custom' == 'Right Center')
            {left=screen.width-415-10;
             top=screen.height/2-345/2;
            }
           if('Custom' == 'Right Bottom')
            {left=screen.width-415-10;
             top=screen.height-345-60;
            }
            if('Custom' == 'Bottom Center')
            {left=screen.width/2-415/2;
             top=screen.height-345-60;
            }
            if('Custom' == 'Left Bottom')
            {left=0;
             top=screen.height-345-60;
            }
            if('Custom' == 'Left Center')
            {left=0;
             top=screen.height/2-345/2;
            }
            if('Custom' == 'Left Top')
            {left=0;
             top=0;
            }
            if('Custom' == 'Default')
            {left=Math.random()*799;
             top=Math.random()*599;
            }
        }

        if(345 > 500)
        {
         window.open(""+path+"!popUp.action?adID=91","popUp1280458473734","height=345, width=415, top="+top+", left="+left+", toolbar=no, menubar=no, scrollbars=yes, resizable=no, location=no, status=no");
        }
        else
        {
          window.open(""+path+"!popUp.action?adID=91","popUp1280458473734","height=345, width=415, top="+top+", left="+left+", toolbar=no, menubar=no, scrollbars=no, resizable=no, location=no, status=no");
        }
      }

setWindowPosition();