function makeactive(tab) 
{ 
	//alert("ma" +tab);
	if(tab==1)
	{
		document.getElementById("friends").style.display = "inline"; 
		document.getElementById("corpsponsors").style.display = "none";
		document.getElementById("volunteers").style.display = "none";
		document.getElementById("how-donate").style.display = "none";
		document.getElementById('img-friends').src='imgs/butn_friends.jpg';
		document.getElementById('img-corpsponsors').src='imgs/butn_sponsorsover.jpg';
		document.getElementById('img-volunteers').src='imgs/butn_volunteersover.jpg';
		document.getElementById('img-donate').src='imgs/butn_donateover.jpg';
	}
	else if(tab==2)
	{
		document.getElementById("friends").style.display = "none"; 
		document.getElementById("corpsponsors").style.display = "inline"; 
		document.getElementById("volunteers").style.display = "none";
		document.getElementById("how-donate").style.display = "none";
		document.getElementById('img-friends').src='imgs/butn_friendsover.jpg';
		document.getElementById('img-corpsponsors').src='imgs/butn_sponsors.jpg';
		document.getElementById('img-volunteers').src='imgs/butn_volunteersover.jpg';
		document.getElementById('img-donate').src='imgs/butn_donateover.jpg';
	}
	else if(tab==3)
	{
		document.getElementById("friends").style.display = "none"; 
		document.getElementById("corpsponsors").style.display = "none"; 
		document.getElementById("volunteers").style.display = "inline";
		document.getElementById("how-donate").style.display = "none";
		document.getElementById('img-friends').src='imgs/butn_friendsover.jpg';
		document.getElementById('img-corpsponsors').src='imgs/butn_sponsorsover.jpg';
		document.getElementById('img-volunteers').src='imgs/butn_volunteers.jpg';
		document.getElementById('img-donate').src='imgs/butn_donateover.jpg';
	}
	else
	{
		document.getElementById("friends").style.display = "none"; 
		document.getElementById("corpsponsors").style.display = "none";
		document.getElementById("volunteers").style.display = "none";
		document.getElementById("how-donate").style.display = "inline";
		document.getElementById('img-friends').src='imgs/butn_friendsover.jpg';
		document.getElementById('img-corpsponsors').src='imgs/butn_sponsorsover.jpg';
		document.getElementById('img-volunteers').src='imgs/butn_volunteersover.jpg';
		document.getElementById('img-donate').src='imgs/butn_donate.jpg';
	}
}