function sign_up(){

     var url = 'send_contacts.php';
     var pars = Form.serialize('contacts');
     
     var myAjax = new Ajax.Request( url, {method: 'post', parameters: pars, onSuccess: checkSended});
}

function getEl(el)
{
	if ( document.getElementById )
	{
		return( document.getElementById(el) );
	}
	else if (document.all)
	{
		return( document.all[el] );
	}
	
}


function checkSended(response)
{ 
 var target = 'error';

if (response.responseText.match("Information was sent"))
 {  getEl('contacts').reset();
   
 }
  getEl(target).innerHTML= response.responseText;

}