//menu1
function G1S1() {
	window.location = "index.php?doc=html/intro.html";
}

function G1S2() {
	window.location = "index.php?doc=html/intro.html";
}

function G1S3() {
	window.location = "index.php?doc=html/intro.html";
}

//menu2
function G2S1() {
	window.location = "index.php?doc=html/intro.html";
}

function G2S2() {
	window.location = "index.php?doc=html/intro.html";
}

//menu3
function G3S1() {
	window.location = "index.php?doc=html/intro.html";
}