function changeBG() {
	var screenW = 1600, screenH = 1200;
	if (parseInt(navigator.appVersion)>3) {
	 screenW = screen.width;
	 screenH = screen.height;
	}
	else if (navigator.appName == "Netscape" 
	    && parseInt(navigator.appVersion)==3
	    && navigator.javaEnabled()
	   ) 
	{
	 var jToolkit = java.awt.Toolkit.getDefaultToolkit();
	 var jScreenSize = jToolkit.getScreenSize();
	 screenW = jScreenSize.width;
	 screenH = jScreenSize.height;
	}
	
	/*document.write(
	 "Screen width = "+screenW+"<br>"
	+"Screen height = "+screenH
	)*/
	if (screenW == 1600) { document.getElementById('bod').style.backgroundImage = "url('./images/layout/bodybg_1600.jpg')"; }
	else if (screenW == 1440) { document.getElementById('bod').style.backgroundImage = "url('./images/layout/bodybg_1440.jpg')"; }
	else if (screenW == 1280) { document.getElementById('bod').style.backgroundImage = "url('./images/layout/bodybg_1280.jpg')"; }
	else if (screenW == 1280) { document.getElementById('bod').style.backgroundImage = "url('./images/layout/bodybg_1280.jpg')"; }
	else if (screenW == 1200) { document.getElementById('bod').style.backgroundImage = "url('./images/layout/bodybg_1200.jpg')"; }
	else if (screenW == 1024) { document.getElementById('bod').style.backgroundImage = "url('./images/layout/bodybg_1024.jpg')"; }
	else if (screenW == 800) { document.getElementById('bod').style.backgroundImage = "url('./images/layout/bodybg_800.jpg')"; }
	else { document.getElementById('bod').style.backgroundImage = "url('./images/layout/bodybg_1600.jpg')"; }
}