function cf(obj){
  if(obj.value == obj.defaultValue) obj.value='';
}
function rf(obj){
  if(obj.value =='')obj.value=obj.defaultValue;
}
function df(f){
  el=f.elements
  for (i=0;i<el.length;i++)
    if (el[i].type=='text' && el[i].value == el[i].defaultValue)
      el[i].value='';
    return true
  }
  

function ref()
{
window.location.reload()
}
function validate_form()
{
// validity = true; // assume valid
   var valid=1
 var x
   
	if (document.details.contact_email.value=="" && valid==1)
    { validity = false; alert('Email  field is empty !');
		 document.details.contact_email.focus();
		 valid=0;	
	}
	if (check_email(document.details.contact_email.value)==false && valid==1)
    { validity = false; alert('Email  is invalid !'); 
	 document.details.contact_email.focus();
	  valid=0	;
	}
	
if (valid==1)
{ 
	details.submit();
	return true;
}
else
{ 
	return false;
}

 }

function check_empty(text) {
  return (text.length > 0); // returns false if empty
}

function check_email(address) {
  if ((address == "")
    || (address.indexOf ('@') == -1)
    || (address.indexOf ('.') == -1))
      return false;
  return true;
}

function checknumber(value)
  { 
   
     for(j=0;j<value.length;j++)
     {c=value.charAt(j);
        if((c!='0')&& (c!='1')&&(c!='2')&&(c!='3')&&(c!='4')&&(c!='5')&&(c!='6')&&(c!='7')&&(c!='8')&&(c!='9'))
        return false;
     }
     return true;
}