function isWhiteSpaces(S)
{
	var isNull
	if (S.length == 0 ) 
		isNull = true;
	else
	{
		for (I=0;I < S.length; I++ )
		{
			isNull = S.substring(I,I+1)==" "?true:false
			if (!isNull) break;
		}
	}
	return isNull;
}

function isAlpha(S)
{
	for (var i=0; i<S.length; i++) 
	{
		var ch = S.charAt(i);
		if ((ch < 'a' || ch > 'z') && (ch < 'A' || ch > 'Z') && (ch != ' ') && (ch <'0') && (ch >'9')) 
			return false;
	}
	return true;
}

function isNumeric(S)
{
	if (!isNaN(S))	
		return true;	
	return false;
}

function isEmail(email)
{
	var isNullEmail = isWhiteSpaces(email)
	var emailLength = email.length
	var isSPACEexists = email.indexOf(" ") + 1
	var isATexistsFirst = email.indexOf("@")
	var isATexistsLast = email.lastIndexOf("@")
	var isDOTexistsFirst = email.indexOf(".",isATexistsFirst+1)
	var isDOTexistsNext1 = email.indexOf(".",isATexistsFirst+1)
	var isDOTexistsNext2 
	var isDOTexistsLast = email.lastIndexOf(".")

	if ((emailLength < 8 ) || (isDOTexistsFirst < isATexistsFirst+3) || (isATexistsFirst < 2) ||
   	 	(isDOTexistsLast == emailLength-1) || (isATexistsLast == emailLength-1) ||
    	(isDOTexistsFirst == 0) || (isATexistsFirst == 0) || (isATexistsFirst == isDOTexistsFirst) ||
    	(isATexistsFirst != isATexistsLast) || isSPACEexists || isNullEmail)
	{
		return false;
	}

	while (isDOTexistsNext1 < isDOTexistsLast)
	{
		isDOTexistsNext2 = email.indexOf(".",isDOTexistsNext1+1)
		if (isDOTexistsNext1+1 == isDOTexistsNext2)
		{
			return false;
		}
		isDOTexistsNext1 = isDOTexistsNext2
	}

	return true;
}


function validate ()
	{
	
	if (isWhiteSpaces(document.form1.name1.value))
	{
		alert("First name?");
		document.form1.name1.focus();
		return false;
	}
	if (isWhiteSpaces(document.form1.name3.value))
	{
		alert("Last name?");
		document.form1.name3.focus();
		return false;
	}
	if (isWhiteSpaces(document.form1.age.value))
	{
		alert("Your age?");
		document.form1.age.focus();
		return false;
	}
	if (isWhiteSpaces(document.form1.add.value))
	{
		alert("Your address?");
		document.form1.add.focus();
		return false;
	}
	if (isWhiteSpaces(document.form1.add2.value))
	{
		alert("Your city?");
		document.form1.add2.focus();
		return false;
	}
	if (isWhiteSpaces(document.form1.add4.value))
	{
		alert("Your country?");
		document.form1.add4.focus();
		return false;
	}
	if (isWhiteSpaces(document.form1.phone.value))
	{
		alert ('Your contact no.?');
		document.form1.phone.focus();
		return false;
	}
	if (document.form1.phone.value.search(/\d{8}/)==-1)
   {
      alert("Enter digits only");
	  document.form1.phone.focus();
      return false;
   }
	if (document.form1.time.value=="")
	{
		alert ('Enter your preferred time.');
		document.form1.time.focus();
		return false;
	}
	
	if (isWhiteSpaces(document.form1.email.value))
	{
		alert ('Your email id?');
		document.form1.email.focus();
		return false;
	}
	
	if (!isEmail(document.form1.email.value))
	{
		alert ("Enter email id in 'abc@xyz.com' format.");
		document.form1.email.focus();
		return false;
	}
	
	if (isWhiteSpaces(document.form1.medical.value))
	{
		alert ('Enter your medical details.');
		document.form1.medical.focus();
		return false;
	}
	
	if (isWhiteSpaces(document.form1.date1.value))
	{
		alert ('Enter your preferred date.');
		document.form1.date1.focus();
		return false;
	}
	

	
	if (isWhiteSpaces(document.form1.captchacode.value))
	{
		alert ('Enter Image Verification Code......');
		document.form1.captchacode.focus();
		return false;
	}
}
// artritis week form

function validate2()
{
		
	if (isWhiteSpaces(document.form2.name.value))
	{
		alert("Name?");
		document.form2.name.focus();
		return false;
	}
	if (isWhiteSpaces(document.form2.email.value))
	{
		alert ('Your email id?');
		document.form2.email.focus();
		return false;
	}
	
	if (!isEmail(document.form2.email.value))
	{
		alert ("Enter email id in 'abc@xyz.com' format.");
		document.form2.email.focus();
		return false;
	}
	
	if (isWhiteSpaces(document.form2.age.value))
	{
		alert("Your age?");
		document.form2.age.focus();
		return false;
	}
	
	/*if (isWhiteSpaces(document.form2.phone.value))
	{
		alert ('Your phone no.?');
		document.form2.phone.focus();
		return false;
	}
	if (!isNumeric(document.form2.phone.value))
	{
		alert ('Enter digits only');
		document.form2.phone.focus();
		return false;
	}
	if (document.form2.phone.value.search(/\d{8}/)==-1)
   {
      alert("Enter min 8 digits phone no.");
	  document.form2.phone.focus();
      return false;
   }*/
   
   if (isWhiteSpaces(document.form2.mobile.value))
	{
		alert ('Your mobile no.?');
		document.form2.mobile.focus();
		return false;
	}
	if (!isNumeric(document.form2.mobile.value))
	{
		alert ('Enter digits only');
		document.form2.mobile.focus();
		return false;
	}
	if (document.form2.mobile.value.search(/\d{10}/)==-1)
    {
      alert("Enter 10 digits mobile no.");
	  document.form2.mobile.focus();
      return false;
    }
   
	if (isWhiteSpaces(document.form2.captchacode.value))
	{
		alert ('Enter Image Verification Code......');
		document.form2.captchacode.focus();
		return false;
	}
}

function validate3()
{
		
	if (isWhiteSpaces(document.form3.name.value))
	{
		alert("Name?");
		document.form3.name.focus();
		return false;
	}
	if (isWhiteSpaces(document.form3.email.value))
	{
		alert ('Your email id?');
		document.form3.email.focus();
		return false;
	}
	
	if (!isEmail(document.form3.email.value))
	{
		alert ("Enter email id in 'abc@xyz.com' format.");
		document.form3.email.focus();
		return false;
	}
	
	if (isWhiteSpaces(document.form3.mobile.value))
	{
		alert ('Your mobile no.?');
		document.form3.mobile.focus();
		return false;
	}
	if (!isNumeric(document.form3.mobile.value))
	{
		alert ('Enter digits only');
		document.form3.mobile.focus();
		return false;
	}
	if (document.form3.mobile.value.search(/\d{10}/)==-1)
    {
      alert("Enter 10 digits mobile no.");
	  document.form3.mobile.focus();
      return false;
    }
   
	if (isWhiteSpaces(document.form3.captchacode.value))
	{
		alert ('Enter Image Verification Code......');
		document.form3.captchacode.focus();
		return false;
	}
}
function validate4()
{
		
	if (isWhiteSpaces(document.form4.name.value))
	{
		alert("Name?");
		document.form4.name.focus();
		return false;
	}
	if (isWhiteSpaces(document.form4.designation.value))
	{
		alert("Designation?");
		document.form4.designation.focus();
		return false;
	}
	if (isWhiteSpaces(document.form4.email.value))
	{
		alert ('Email id?');
		document.form4.email.focus();
		return false;
	}
	
	if (!isEmail(document.form4.email.value))
	{
		alert ("Enter email id in 'abc@xyz.com' format.");
		document.form4.email.focus();
		return false;
	}
		   
   if (isWhiteSpaces(document.form4.phone.value))
	{
		alert ('Contact no.?');
		document.form4.phone.focus();
		return false;
	}
	if (!isNumeric(document.form4.phone.value))
	{
		alert ('Enter digits only');
		document.form4.phone.focus();
		return false;
	}
	if (document.form4.phone.value.search(/\d{8}/)==-1)
    {
      alert("Enter min 8 digits contact no.");
	  document.form4.phone.focus();
      return false;
    }
   	if (isWhiteSpaces(document.form4.name2.value))
	{
		alert("Recommended By?");
		document.form4.name2.focus();
		return false;
	}
	if (isWhiteSpaces(document.form4.add.value))
	{
		alert("Reasons for Recommendation?");
		document.form4.add.focus();
		return false;
	}
	if (isWhiteSpaces(document.form4.captchacode.value))
	{
		alert ('Enter Image Verification Code......');
		document.form4.captchacode.focus();
		return false;
	}
}