var div1;
var dv1;
var dv2;
var dv3;
var dv4;
var dv5;
var regTag=/^[0-9a-zA-Z_]+$/;
//var regSrch=/^[0-9a-zA-Z_()-:!/]+$/;
function isNull(aStr)
{
	var index;		
	for (index=0; index < aStr.length; index++)
		if (aStr.charAt(index) != ' ')
			return false;
	return true;
}
function trim(str)
{
    s = str.replace(/^(\s)*/, '');
    s = s.replace(/(\s)*$/, '');
    return s;
}
//For checking invalid E-Mail address
function isEmail(aStr)
{
	var reEmail=/^[0-9a-zA-Z_'\.-]+\@[0-9a-zA-Z_\.-]+\.[0-9a-zA-Z_\.-]+$/;
	if(!reEmail.test(aStr))
	{
		return false;
	}
	return true;
}
function isNumeric(value)
{
	var regNumeric=/^[0-9]+$/;
	if(!regNumeric.test(value))
	{
		return false;
	}
	return true;
}

function chkForm()
{	
   	if(document.getElementById("sTitle").value =='')
	{
	  alert("Please enter the title");
	  document.getElementById("sTitle").focus();
	  return false;
	}
	if(document.getElementById("sDescription").value =='')
	{
	  alert("Please enter the description");
	  document.getElementById("sDescription").focus();
	  return false;
	}
	else
	{
	  return true;	
	}

}
 
 
 
function isValidPhoneNum(value)
{
	var regNumeric=/^[0-9.-]+$/;
	if(!regNumeric.test(value))
	{
		return false;
	}
	return true;
}
function clear_text()
{
	var email_book = document.getElementById("email_book").value;
	if(email_book=="enter your email")
	{
	     document.getElementById("email_book").value= "";
	}
 
}
function validate_subscribe()
{
	 
	var url; 
	var email_book = document.getElementById("email_book").value;
  
	if(isNull(trim(email_book)))
	{
      alert("Please enter the email.");
	  document.getElementById("email_book").focus();
	  return false;
	}
	if(!isEmail(trim(email_book)))
	{
      alert("Please enter valid email address.");
	  document.getElementById("email_book").focus();
	  return false;
	}
	else
	{   
	 	document.frm.submit();
	 
 	}

}