function showcompleted()
{
	document.getElementById('completed').style.display = "block";
	document.getElementById('ongoing').style.display = "none";
	document.getElementById('upcoming').style.display = "none";
	document.getElementById('all').style.display = "none";
	
	document.getElementById('completed_tab').setAttribute("class","current");
	document.getElementById('ongoing_tab').setAttribute("class","");
	document.getElementById('upcoming_tab').setAttribute("class","");
	document.getElementById('all_tab').setAttribute("class","");
}
function showongoing()
{
	document.getElementById('completed').style.display = "none";
	document.getElementById('ongoing').style.display = "block";
	document.getElementById('upcoming').style.display = "none";
	document.getElementById('all').style.display = "none";
	
	document.getElementById('completed_tab').setAttribute("class","");
	document.getElementById('ongoing_tab').setAttribute("class","current");
	document.getElementById('upcoming_tab').setAttribute("class","");
	document.getElementById('all_tab').setAttribute("class","");
}
function showupcoming()
{	
	document.getElementById('completed').style.display = "none";
	document.getElementById('ongoing').style.display = "none";
	document.getElementById('upcoming').style.display = "block";
	document.getElementById('all').style.display = "none";
	
	document.getElementById('completed_tab').setAttribute("class","");
	document.getElementById('ongoing_tab').setAttribute("class","");
	document.getElementById('upcoming_tab').setAttribute("class","current");
	document.getElementById('all_tab').setAttribute("class","");
}

function showall()
{	
	document.getElementById('all').style.display = "block";
	document.getElementById('completed').style.display = "none";
	document.getElementById('ongoing').style.display = "none";
	document.getElementById('upcoming').style.display = "none";
	
	document.getElementById('completed_tab').setAttribute("class","");
	document.getElementById('ongoing_tab').setAttribute("class","");
	document.getElementById('upcoming_tab').setAttribute("class","");
	document.getElementById('all_tab').setAttribute("class","current");
}
function checkFormEntries()
{	
	
		var d = document;
		var len = 0;
		
		//checking that the required fields are not empty.
		if((d.getElementById('person_name').value != '') 
			&& (d.getElementById('phone').value != '')
			&& (d.getElementById('email').value != '')
			&& (d.getElementById('info_required').value != ''))
		{	
			len = d.getElementById('phone').value; 
			if(len.length<10)
			{
				alert('Phone Number Length is InValid');	
				return false;
			}
			//checking that the email_id is indeed a email_id
			if(!validator.isEmailId(d.getElementById('email').value))
			{
				alert('Invalid Email ID');
				return false;
			}
			return true;
		}
		else
		{
			alert("Please Fill all the fields.");
			return false;
		}

}