function login_check(){
    if(document.login.username.value == "" || document.login.password.value == ""){
        alert ( "Please Enter Your Username and Password First!!" );
        return false;
    }
}
function search_check(){
    if(document.search_main.search_ref.value == "" ){
        alert ( "Please Enter Your Ref# Number First!!" );
        return false;
    }
}
function check_bid(){
	if(document.bidform.bid_value.value == "" || document.bidform.bid_value.value <= document.getElementById('min_bid').value){
        alert ( "Minimum bid must be bigger than "+document.getElementById('min_bid').value+" Euro" );
        return false;		
	}
}