ns4 = (document.layers)?true:false
ie4 = (document.all)?true:false

// initialize

function init() {
	if (ns4) { sub1 = document.submn1
			   sub2 = document.submn2
			   sub3 = document.submn3			   
			 }

	if (ie4) { sub1 = submn1.style
			   sub2 = submn2.style
			   sub3 = submn3.style
			 }

}


function checkShow(key) {
	if (key == 's1') {	
	if (ns4) {sub1.visibility = "show"}
	if (ie4) {sub1.visibility = "visible"}
	}
	if (key == 's2') {	
	if (ns4) {sub2.visibility = "show"}
	if (ie4) {sub2.visibility = "visible"}
	}
	if (key == 's3') {	
	if (ns4) {sub3.visibility = "show"}
	if (ie4) {sub3.visibility = "visible"}
	}	
}

function checkHide(key) {
	if (key == 's1') {
	if (ns4) {sub1.visibility = "Hidden"}
	if (ie4) {sub1.visibility = "Hidden"}
	}
	if (key == 's2') {
	if (ns4) {sub2.visibility = "Hidden"}
	if (ie4) {sub2.visibility = "Hidden"}
	}
	if (key == 's3') {
	if (ns4) {sub3.visibility = "Hidden"}
	if (ie4) {sub3.visibility = "Hidden"}
	}
}