function cha_pic(pic_name)
{
  document.changepic_form.main_pic.src="uploaded_img/medium/"+pic_name;
}


function checkAll(checkWhat) {
  var inputs = document.getElementsByTagName("input");
  for(index = 0; index < inputs.length; index++)
  {
    if(inputs[index].id == checkWhat)
      if(inputs[index].checked == 0)
        {
          inputs[index].checked = 1;
        }
      else if(inputs[index].checked == 1)
        {
          inputs[index].checked = 0;
        }
  }
}


function confirmMsg(msg){
  if(!confirm(msg)){
    return false;

  } else {
    return true;

  }
}



function openwin(url,width,height)
{
  window.open(url,"","scrollbars=no,toolbar=no,location=no,directories=no,status=no,resizable=no,menubar=no,width="+width+",height="+height);
}


function checkEmail(email) {
	if (email.indexOf("@")==-1){
		alert("Please input a valid email address!")
		return false
	}

}