function checkEmpty(frm)
	{
		if (frm.username.value == "" || frm.password.value == "")
		{
			alert("Please enter username & password.");
			frm.username.focus();
			return false;
		}
		return true;
	}
		function checkall()
	{
	
var len=document.forms.contactform.checkmail.length;
if(len!=null)
{

for(var i=0;i<len;i++)
{
if(document.getElementById('checkbox').checked==true)
	{
document.forms.contactform.checkmail[i].checked=true;
}
else
{
document.forms.contactform.checkmail[i].checked=false;
}
}
}
else
{
if(document.getElementById('checkbox').checked==true)
	{
document.forms.contactform.checkmail.checked=true;
}
else
{
document.forms.contactform.checkmail.checked=false;
}
}

	}
	
	function defaultval()
	{
	var defaultname="Your name";
	var defaultemail="Your email";
	var defaultname1="Your friends name";
	var defaultemail1="Your friends email";
	document.mailform.name.value=defaultname;
		document.mailform.email.value=defaultemail;
			document.mailform.name1.value=defaultname1;
				document.mailform.email1.value=defaultemail1;
					document.mailform.name2.value=defaultname1;
				document.mailform.email2.value=defaultemail1;
					document.mailform.name3.value=defaultname1;
				document.mailform.email3.value=defaultemail1;
	}
	function  validate(contactform)
	{
	defaultval()
var len=document.forms.contactform.checkmail.length;
var cnt=0;
if(len!=null)
{

for(var i=0;i<len;i++)
{
if(document.forms.contactform.checkmail[i].checked==true)
{
cnt++;
}
}
}
else
{
if(document.forms.contactform.checkmail.checked==true)
{
cnt++;
}
}
if(cnt==0)
{
alert('Please check atleast one email');
return false;
}
	}
	
	
	function changevalue(obj)
	{
	    
		
	
	var defaultname="Your name";
	var defaultemail="Your email";
	var defaultname1="Your friends name";
	var defaultemail1="Your friends email";
	
	if(obj.value==defaultname ||  obj.value==defaultemail || obj.value==defaultname1 || obj.value==defaultemail1)
	{
	obj.value='';
	}
	if(obj.value=='')
	{
	document.getElementById('mailformerror').innerHTML='';
	}
	var cnt=document.mailform.length;
for(var i=0;i<cnt;i++)
{
if(document.mailform.elements[i].name!=obj.name && (document.mailform.elements[i].name=='name' ||  document.mailform.elements[i].name=='email')  && (document.mailform.elements[i].value=='' || document.mailform.elements[i].value==defaultname || document.mailform.elements[i].value==defaultemail ) )
{
if(document.mailform.elements[i].name=='name')
{
 document.mailform.elements[i].value=defaultname;
 }
 if(document.mailform.elements[i].name=='email')
{
 document.mailform.elements[i].value=defaultemail;
 }
}
if(document.mailform.elements[i].name!=obj.name && document.mailform.elements[i].name!='name' &&  document.mailform.elements[i].name!='email'  && (document.mailform.elements[i].value=='' || document.mailform.elements[i].value==defaultname1 || document.mailform.elements[i].value==defaultemail1 ) )
{
if(document.mailform.elements[i].name=='name1' ||  document.mailform.elements[i].name=='name2'  || document.mailform.elements[i].name=='name3')
{
 document.mailform.elements[i].value=defaultname1;
 }
 if(document.mailform.elements[i].name=='email1' ||  document.mailform.elements[i].name=='email2'  || document.mailform.elements[i].name=='email3')
{
 document.mailform.elements[i].value=defaultemail1;
 }
}
}
	}
function mailformvalidate(mailform)
{
changevalue('')
   var defaultname="Your name";
	var defaultemail="Your email";
	var defaultname1="Your friends name";
	var defaultemail1="Your friends email";
	if( document.getElementById('email').value==defaultemail ||  (document.getElementById('email1').value==defaultemail1 && document.getElementById('email2').value==defaultemail1  && document.getElementById('email3').value==defaultname1) || (document.getElementById('email').value== document.getElementById('email1').value ||  document.getElementById('email').value== document.getElementById('email2').value || document.getElementById('email').value== document.getElementById('email3').value))
	{
	var msg="Please Enter ";
	if(document.getElementById('email').value==defaultemail)
	{
	msg+=defaultemail;
	}
	if((document.getElementById('email1').value==defaultemail1 && document.getElementById('email2').value==defaultemail1  && document.getElementById('email3').value==defaultemail1))
	{
	msg+=", any of "+defaultemail1;
	}
	
	if((document.getElementById('email').value== document.getElementById('email1').value ||  document.getElementById('email').value== document.getElementById('email2').value || document.getElementById('email').value== document.getElementById('email3').value))
	{
		msg='';
	 msg+="Your email should not be your friend's email"
	
	
			if(document.getElementById('email').value== document.getElementById('email1').value)
			{
			 document.getElementById('email1').focus();
			}
			
			if(document.getElementById('email').value== document.getElementById('email2').value)
			{
			document.getElementById('email2').focus();
			}
			if(document.getElementById('email').value== document.getElementById('email2').value)
			{
			document.getElementById('email3').focus();
			}
	}
	document.getElementById('mailformerror').innerHTML=msg;

	return false;
}
}