function OnFocus(ID){
		Elem = document.getElementById(ID);
		Elem.className = 'onfocus';
		if(ID == 'free_book_name'){
			if(Elem.value == 'Name'){
				Elem.value = '';
			}
		}
		else if(ID == 'free_book_email'){
			if(Elem.value == 'Email'){
				Elem.value = '';
			}
		}
		else if(ID == 'free_book_phone'){
			if(Elem.value == 'Phone'){
				Elem.value = '';
			}
		}
	}
	
	function OnBlur(ID){
		Elem = document.getElementById(ID);
		
		if(Elem.value == ''){
			if(ID == 'free_book_name'){
				Elem.className = 'onblur';
				Elem.value = 'Name';
			}
			else if(ID == 'free_book_email'){
				Elem.className = 'onblur';
				Elem.value = 'Email';
			}
			else if(ID == 'free_book_phone'){
				Elem.className = 'onblur';
				Elem.value = 'Phone';
			}
		}
		else{
			if(ID == 'free_book_name'){
				if(Elem.value == 'Name'){
					Elem.className = 'onblur';
				}								
			}
			else if(ID == 'free_book_email'){
				if(Elem.value == 'Email'){
					Elem.className = 'onblur';
				}
			}
			else if(ID == 'free_book_phone'){
				if(Elem.value == 'Phone'){
					Elem.className = 'onblur';
				}
			}
		}
	}			
	

function mail_check(id)
{
	var url_base = document.getElementById(id).value;
	preg = /^[0-9a-z\-\_\.]{1,64}@([0-9a-z\-\_]{1,64}\.){1,3}([0-9a-z\-\_]){1,6}$/i
	if ( url_base.search(preg) == -1 )
	{
		return 1;
	} else
		{
			return 0;
		}
}

function checkValidSubscribe()
{
	var err_msg = '';
	var err = 0;
	var name = document.getElementById('free_book_name');
	if (name.value=='' || name.value=='Name')
	{
		err_msg = 'Field \'Name\' must not be empty!';
		err++;
	}
	if ( mail_check('free_book_email'))
	{
		err_msg = err_msg + '<br />'+'Field \'Email\' must be email!'; 
		err++;
	}
	var phone = document.getElementById('free_book_phone');
	if (phone.value=='' || phone.value=='Phone')
	{
		err_msg = err_msg + '<br />'+'Field \'Phone\' must not be empty!'; 
		err++;
	}
	preg = /^[0-9\-\(\)\s]+$/;
	if (phone.value.search(preg) == -1)
	{
		err_msg = err_msg + '<br />'+'Field \'Phone\' not valid!'; 
		err++;
	}
	if (err==0)
	{
		document.getElementById('sb_form').submit();
	} else
		{
			document.getElementById('errors').innerHTML = err_msg;
		}
}