function toggle_Element(element) {
	if (document.getElementById(element).style.display == 'none') {
		document.getElementById(element).style.display = 'block';
	}
	else {
		document.getElementById(element).style.display = 'none';
	}
}

function changeContact(value)
{
	for (i=1;i<=4;i++)	{
		document.getElementById('c'+i).style.display = 'none';
	}
	document.getElementById('c'+value).style.display = 'block';
}