function changeclass(id) {

var name = document.getElementById("li_"+id)

if(name.className == ""){
	name.className="expanded";
	document.getElementById('p_'+id).style.display = 'block';
}
else if(name.className == "expanded"){
	name.className="";
	document.getElementById('p_'+id).style.display = 'none';
}
}

function checkForm(send)	{
	
	var error = true;  
	
	var name_1 = document.getElementById('name_1');
	var name_2 = document.getElementById('name_2');
	var name_3 = document.getElementById('name_3');
	var name_4 = document.getElementById('name_4');
	

	if (name_1.value == '')	{
		error = false;
		document.getElementById("errorBoxes_1").innerHTML="Enter valid Name!";
	}	else	{
		document.getElementById("errorBoxes_1").innerHTML="";
	}
	if (name_2.value == '')	{
		error = false;
		document.getElementById("errorBoxes_2").innerHTML="Enter valid Name!";
	}	else	{
		document.getElementById("errorBoxes_2").innerHTML="";
	}
	if (name_3.value == '')	{
		error = false;
		document.getElementById("errorBoxes_3").innerHTML="Enter valid Name!";
	}	else	{
		document.getElementById("errorBoxes_3").innerHTML="";
	}
	if (name_4.value == '')	{
		error = false;
		document.getElementById("errorBoxes_4").innerHTML="Enter valid Name!";
	}	else	{
		document.getElementById("errorBoxes_4").innerHTML="";
	}	
	
	return error;
}