var popNameWindow = null;  // This must be declared as a global

function MakePop(width,height) {

closePop();

var features = 'width=' + width + ',height=' + height;



 popNameWindow = window.open('','HMX',features);

 popNameWindow.focus();

 }



function openNewWindow(URLtoOpen, windowName, windowFeatures)

{

	closePop();

	popNameWindow=window.open(URLtoOpen, windowName, windowFeatures);



 popNameWindow.focus();

 }

function closePop() {

    if ( ( popNameWindow != null ) && ( !popNameWindow.closed ))  {

        // window is still open -> close it

        popNameWindow.close();

        popNameWindow = null;

    }

}