function openwindow(url, width, height) {
	// hack for IE 7
	if(navigator.appVersion.indexOf('MSIE 7') != -1) {
		height += 20;
	}
	
	xposition = 20; yposition = 20;
	if ((parseInt(navigator.appVersion) >= 4 )){
		xposition = (screen.width - width) / 2;
		yposition = (screen.height - height) / 2;
	}
	
	args = "width=" + width + "," 
		    + "height=" + height + "," 
			+ "location=0," 
			+ "menubar=0,"
			+ "resizable=0,"
			+ "scrollbars=no,"
			+ "status=0," 
			+ "titlebar=0,"
			+ "toolbar=0,"
			+ "hotkeys=0,"
			+ "screenx=" + xposition + ","  //NN Only
			+ "screeny=" + yposition + ","  //NN Only
			+ "left=" + xposition + ","     //IE Only
			+ "top=" + yposition;           //IE Only 
	ww = window.open(url, '', args);
} 

function openwindow2(url, width, height) {
	// hack for IE 7
	if(navigator.appVersion.indexOf('MSIE 7') != -1) {
		height += 20;
	}
	
	xposition = 20; yposition = 20;
	if ((parseInt(navigator.appVersion) >= 4 )){
		xposition = (screen.width - width) / 2;
		yposition = (screen.height - height) / 2;
	}
	
	args = "width=" + width + "," 
		    + "height=" + height + "," 
			+ "location=0," 
			+ "menubar=0,"
			+ "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 
	ww = window.open(url, '', args);
}