function del(url){
	document.getElementById('tips').style.display = "block";
	document.getElementById('tips_text').innerHTML = "你确定要删除吗？该操作将不可还原。";
	document.getElementById('del_a').href = url;	
}

function del_cancel(){
	document.getElementById('tips').style.display = "none";
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
  	window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}