var ElemId;

function toggle_State(ElemId)
{

	if(document.getElementById(ElemId).className!="navigation_bg"){
		document.getElementById(ElemId).className="navigation_bg";
		}
	else{
		document.getElementById(ElemId).className="top_nav";
	}

}

var ElemId_home;

function change_State(ElemId_home)
{

	if(document.getElementById(ElemId_home).className!="home_nav_btn"){
		document.getElementById(ElemId_home).className="home_nav_btn";
		}
	else{
		document.getElementById(ElemId_home).className="home_activenav_btn";
	}

}

var ElemId_contact;

function shift_State(ElemId_contact)
{

	if(document.getElementById(ElemId_contact).className!="contact_nav_btn"){
		document.getElementById(ElemId_contact).className="contact_nav_btn";
		}
	else{
		document.getElementById(ElemId_contact).className="contact_activenav_btn";
	}

}