//==trim string
function trim(s) {
  while (s.substring(0,1) == ' ') {
    s = s.substring(1,s.length);
  }
  while (s.substring(s.length-1,s.length) == ' ') {
    s = s.substring(0,s.length-1);
  }
  return s;
} 

//===confirm delete
function del_confirm(url,msg){
	var agree=confirm(msg);
	if (agree){
		window.location = url;	
	}
}


function ch_ethn(f){
    if(f.bethnid.value==-1){ 
        f.ethother.disabled=false;        
    }else{                
        f.ethother.disabled=true; 
    }
}
function ch_ethnorg(f){
    if(f.bethnorgid.value==-1){ 
        f.bethnorg.disabled=false;        
    }else{                
        f.bethnorg.disabled=true; 
    }
}

//===support mail size
function validate_support_mail(form){
        var err_msg = '';
        var text = trim(form.mail_text.value);
        if ((text.length > 300)||(text.length < 1)){
                err_msg += 'Mail text is empty or has more than 300 characters!\n'
        }

        if (err_msg != ''){
                alert(err_msg);
        }else{
                form.submit();
        }

}