function show(ele){
	var element = document.getElementById(ele);
	if(element.style.display=='none'||element.style.display==''){
		element.style.display='block';
	} else {
		element.style.display='none';
	}
}

function expand(ele){
	// close others 
	for(i in galleries_ary){
		var element = eval("document.getElementById('project_expansion_"+galleries_ary[i]+"');");
		element.style.display='none';
	}
	//open this one
	show(ele);
}