/*******************************************
 *  copyright (c) by rochsoft
 * 
 *  author : potato
 * 
 *  created date : $time$
 * ****************************************/ 
//去左边的空格
function ltrim(s){
    return s.replace( /^\s*/, "");
}
//去右边的空格
function rtrim(s){
    return s.replace( /\s*$/, "");
}
//去除空格
function trim(s){
    return rtrim(ltrim(s));
} 

function Close()
{
 var ua=navigator.userAgent;
 var ie=navigator.appName=="Microsoft Internet Explorer" ? true : false;
 if(ie)
 {
  var IEversion=parseFloat(ua.substring(ua.indexOf("MSIE ")+5,ua.indexOf(";",ua.indexOf("MSIE "))))
  if(IEversion< 5.5)
  {
     var str  = '<object id=noTipClose classid="clsid:ADB880A6-D8FF-11CF-9377-00AA003B7A11">';
     str += '<param name="Command" value="Close"></object>';
     document.body.insertAdjacentHTML("beforeEnd", str);
     document.all.noTipClose.Click();
  }
    else
  {
     window.opener =null;
     window.open('','_self','');//for IE7
     window.close();
  }
 }
 else
 {
 window.close()
 }
}

/*屏蔽鼠标右键、Ctrl+n、shift+F10、F5刷新、退格键*/
function KeyDown(){ 
    //屏蔽鼠标右键、Ctrl+n、shift+F10、F5刷新、退格键
     //alert("ASCII代码是："+event.keyCode);
     //屏蔽 Alt+ 方向键 ←
     //屏蔽 Alt+ 方向键 →
  if ((window.event.altKey)&&
      ((window.event.keyCode==37)||   
       (window.event.keyCode==39))){  
     alert("不准你使用ALT+方向键前进或后退网页！");
     event.returnValue=false;
     }
     
     //屏蔽退格删除键
     //屏蔽 F5 刷新键
     //屏蔽 F1 刷新键
     //Ctrl + R
  if ((event.keyCode==8)  ||                 
      (event.keyCode==116)||                 
      (event.keyCode==112)||                 
      (event.ctrlKey && event.keyCode==82)){ 
     event.keyCode=0;
     event.returnValue=false;
     }
      //屏蔽 Ctrl+n
  if ((event.ctrlKey)&&(event.keyCode==78))  
     event.returnValue=false;
     //屏蔽 shift+F10
  if ((event.shiftKey)&&(event.keyCode==121)) 
     event.returnValue=false;
     //屏蔽 shift 加鼠标左键新开一网页
  if (window.event.srcElement.tagName == "A" && window.event.shiftKey) 
      window.event.returnValue = false;  
      //屏蔽Alt+F4
  if ((window.event.altKey)&&(window.event.keyCode==115)){ 
      window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");
      return false;}
}