function toggle(id,gImg) {
	document.getElementById('ph1').style.display = "none";
	document.getElementById('ph2').style.display = "none";
	document.getElementById('ph3').style.display = "none";
	document.getElementById('ph4').style.display = "none";
	
	document.getElementById('gImg1').style.opacity = "0.40";
	document.getElementById('gImg2').style.opacity = "0.40";
	document.getElementById('gImg3').style.opacity = "0.40";
	document.getElementById('gImg4').style.opacity = "0.40";
	
	document.getElementById('gImg1').style.filter="alpha(opacity=40)";
	document.getElementById('gImg2').style.filter="alpha(opacity=40)";
	document.getElementById('gImg3').style.filter="alpha(opacity=40)";
	document.getElementById('gImg4').style.filter="alpha(opacity=40)";
	
	document.getElementById(id).style.display = "block";
	document.getElementById(gImg).style.opacity = "1.0";
	document.getElementById(gImg).style.filter="alpha(opacity=100)";
}