function validator()
	{
	
		var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	   	var uname = document.getElementById("uname").value;
		var eaddress = document.getElementById("email_id").value;
		var address = document.getElementById("address").value;
		var phone = document.getElementById("phone").value;
		var age = document.getElementById("age").value;
		var avail_time_start = document.getElementById("avail_time_start").value;
		var avail_time_end = document.getElementById("avail_time_end").value;
		var radio1= document.getElementById("radio1").value;
		var radio2= document.getElementById("radio2").value;
		var details = document.getElementById("details").value;
		details
		
	   	
		if(uname.length == 0) 
	   	{
		  alert('Invalid User Name');
		  return false;
	   	}
		else if(reg.test(eaddress) == false) 
	   	{
		  alert('Invalid Email Address');
		  return false;
	   	}
		else if(address.length == 0)
		{
		  alert('Invalid Address ');
		  return false;
	   	}
		else if(phone.length == 0)
		{
		  alert('Invalid Phone number');
		  return false;
	   	}
		else if(age.length == 0)
		{
		  alert('Invalid age');
		  return false;
	   	}
		else if(avail_time_start.length == 0 )
		{
		  alert('Invalid time');
		  return false;
	   	}
		else if(avail_time_end.length == 0 )
		{
		  alert('Invalid time');
		  return false;
	   	}
		else
		{
			if(document.getElementById("radio1").checked==true)
			{
				
				if(details.length == 0)
				{
					alert('Please enter some details ' + radio1);
					return false;
				}
			}
		
		}
		
		
	}
	
function show_hide(action)
{
	if(action=="hide")
	{
		document.getElementById("exp_hd").style.display="none";	
		document.getElementById("exp_hd2").style.display="none";	
	}
	else
	{
		document.getElementById("exp_hd").style.display="";	
		document.getElementById("exp_hd2").style.display="";	
	}
}