function isInteger(s)
{
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function isalpha(alphane)
{
	var numaric = alphane;
	for(var j=0; j<numaric.length; j++)
		{
		  var alphaa = numaric.charAt(j);
		  var hh = alphaa.charCodeAt(0);
		  if((hh > 64 && hh<91) || (hh > 96 && hh<123))
		  {
		  }
		else	
		{
			 return false;
		}
		}
 return true;
}

function checkMail(email)
{
	var x = email;
	var filter  = /\w+@\w+\.\w{2,3}/;
		if (filter.test(x)) return true;
		else alert('Incorrect email address');
		
}
function checkall(frm)
{
	if(frm.name.value=="")
		{
		alert("Please enter a username");
		frm.name.focus();
		return false;
		}
	if(frm.email.value=="")
		{
		alert("Please enter your email");
		frm.email.focus();
		return false;
		}
	if(!checkMail(frm.email.value))
		{
		frm.email.focus();
		return false;
		}
	if(frm.phone.value=="")
		{
		alert("Please enter phone number");
		frm.phone.focus();
		return false;
		}
return true;
}

function checkall2(frm)
{
	if(frm.name2.value=="")
		{
		alert("Please enter a username");
		frm.name2.focus();
		return false;
		}
	if(frm.email2.value=="")
		{
		alert("Please enter your email");
		frm.email2.focus();
		return false;
		}
	if(!checkMail(frm.email2.value))
		{
		frm.email2.focus();
		return false;
		}
	if(frm.comments.value=="")
		{
		alert("Please write something in comments");
		frm.comments.focus();
		return false;
		}
return true;
}