// JavaScript Document
function val_newsletter()
{
	if(isEmpty(document.getElementById('first_name'),"Please enter your first name")==false)
		{
			document.getElementById('first_name').select();
			document.getElementById('first_name').focus();
			return false;
		}
	if(isEmpty(document.getElementById('last_name'),"Please enter your last name")==false)
		{
			document.getElementById('last_name').select();
			document.getElementById('last_name').focus();
			return false;
		}
	if(isEmpty(document.getElementById('address'),"Please enter your address")==false)
		{
			document.getElementById('address').select();
			document.getElementById('address').focus();
			return false;
		}
	if(isEmpty(document.getElementById('city'),"Please enter your city")==false)
		{
			document.getElementById('city').select();
			document.getElementById('city').focus();
			return false;
		}
	if(isEmpty(document.getElementById('province'),"Please enter your province")==false)
		{
			document.getElementById('province').select();
			document.getElementById('province').focus();
			return false;
		}
	if(isAlphanumeric(document.getElementById('postal_code'),"Please enter your postal code")==false)
		{
			document.getElementById('postal_code').select();
			document.getElementById('postal_code').focus();
			return false;
		}
	if(echeck(document.getElementById('email_id').value)==false)	
		{
			document.getElementById('email_id').select();
			document.getElementById('email_id').focus();
			return false;
		}		
}


//Check empty validation						
function isEmpty(elem, helperMsg){
	if(elem.value.length == 0){
		alert(helperMsg);
		elem.focus(); // set the focus to this input
		return false;
	}
	else
	{
		 return true;
	}
}

//Email Validation
function echeck(str) {

		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str=='')
			{
			alert("Please enter your E-mail ID")
			return false;
			}
		if (str.indexOf(at)==-1)
		{
		   alert("Please enter valid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   alert("Please enter valid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    alert("Please enter valid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Please enter valid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    alert("Please enter valid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    alert("Please enter valid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    alert("Please enter valid E-mail ID")
		    return false
		 }
	}

// Alphanumeric Validation
function isAlphanumeric(elem, helperMsg){
	var alphaExp = /^[0-9a-zA-Z\ \.\-]+$/;
	if(elem.value.match(alphaExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		elem.select();
		return false;
	}
}


// Numeric Validation
function IsNumeric(strString)
   //  check for valid numeric strings	
   {
   var strValidChars = "0123456789- ";
   var strChar;
   var blnResult = true;

   if (strString.length == 0)
   		{ 
   			alert("Please enter your postal code")
   			return false;
		}
   //  test strString consists of valid characters listed above
   for (i = 0; i < strString.length && blnResult == true; i++)
      {
      strChar = strString.charAt(i);
      if (strValidChars.indexOf(strChar) == -1)
         {
		 alert("Please enter valid postal code")
         blnResult = false;
         }
      }
   return blnResult;
}