function popUpWindow(cPopUrl, cPopName, iPopWidth, iPopHeight, bScrollBars) {

//cPopUrl = the name of url to call, bScrollBars = if 'no' or blank, no bars will appear.

	var iPopLeft, iPopTop;

	var oPopWindow = null;

	if (!oPopWindow || oPopWindow.closed){

		//Center popup window inside parent window.

		iPopLeft = (window.screen.width/2) - ((iPopWidth/2) + 10); 

		iPopTop = (window.screen.height/2) - ((iPopHeight/2) + 50); 

		//Open popup window

		oPopWindow=open(cPopUrl, cPopName,"height="+ iPopHeight +",width="+ iPopWidth +",left=" + iPopLeft + ",top=" + iPopTop + ",screenX=" + iPopLeft + ",screenY=" + iPopTop + ",scrollbars=" + bScrollBars + ", statusbar=no");

		oPopWindow.location.href = cPopUrl;

		oPopWindow.focus()

    }

	else {

    	oPopWindow.focus()

	}

}