function isTagFoundInPage(tag) {
	return (document.getElementById(tag) 
			&& document.getElementById(tag).style);
}

function show(content) {
	if(isTagFoundInPage(content)){ 
		var style2 = document.getElementById(content).style;
		style2.display = "block";
	}
}


function hide(content) {
	if(isTagFoundInPage(content)) {
		var style2 = document.getElementById(content).style;
		style2.display = "none";
	}
}


function displayNewSection(tag) {
	hide("summary");
	hide("programming");
	hide("schedule");
	hide("services");
	hide("networking")
	hide("hotel");
	hide("transportation");
	hide("registration");
	hide("sponsors");
	hide("logistics");
	show(tag);
}

function summitOnload(){
	displayNewSection("summary");
	show("sponsors");
}

window.onload=summitOnload;