function openWindow( URL, winName, width, height, center) 
{ 
	  xposition=0; yposition=0; 
	    if ((parseInt(navigator.appVersion) >= 4 ) && (center)){ 
	        xposition = (screen.width - width) / 2; 
	        yposition = (screen.height - height) / 2; 
	    } 
	    args = "width=" + width + "," 
	    + "height=" + height + "," 
	    + "location=0," 
	    + "menubar=1," 
	    + "resizable=1," 
	    + "scrollbars=1," 
	    + "status=0," 
	    + "titlebar=0," 
	    + "toolbar=0," 
	    + "hotkeys=0," 
	    + "screenx=" + xposition + ","  //NN Only 
	    + "screeny=" + yposition + ","  //NN Only 
	    + "left=" + xposition + ","     //IE Only 
	    + "top=" + yposition;           //IE Only 


	  window.open( URL , winName , args ); 
}