function popUp(URL)

{

  day = new Date();

  id = day.getTime();

  eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=280,height=415');");

 }



function popUpPost(URL)

{

  day = new Date();

  id = day.getTime();

  eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=280,height=415');");

 }

  

function openWin(dir,name,w,h)

{

	var left = (screen.availWidth/2) - (w/2);

	var top = (screen.availHeight/2) - (h/2);

	colorWin = window.open(dir, name, 'scrollbars=1, toolbar=0, statusbar=0, width='+w+', height='+h+', left='+left+', top='+top);

	colorWin.focus()

}  



    function dodel(gb,gburl){

	if(confirm(gb)){

		window.location = gburl

	}

}



var ie45,ns6,ns4,dom;

if (navigator.appName=="Microsoft Internet Explorer")

  ie45=parseInt(navigator.appVersion)>=4;

else if (navigator.appName=="Netscape"){

  ns6=parseInt(navigator.appVersion)>=5;

  ns4=parseInt(navigator.appVersion)<5;}

dom=ie45 || ns6;



function showhide(id) {

el = document.all ? document.all[id] : 

  dom ? document.getElementById(id) : 

  document.layers[id];

els = dom ? el.style : el;

if (dom){

  if (els.display == "none")

    els.display = "";

  else els.display = "none";

  }

else if (ns4){

  if (els.display == "show")

    els.display = "hide";

  else els.display = "show";

  }

}



function setsmile(Titi) {

   document.signgb.yousay.value =

   document.signgb.yousay.value + Titi;

}



function openScript(url, width, height) {

        var Win = window.open(url,"openScript",'width=' + width + ',height=' + height + ',resizable=no,scrollbars=yes,menubar=no,status=no' );

}



function check_search(okk)

{

if (okk.key.value == "")

  {

    alert("Chua nhap tu khoa");

   okk.key.focus();

    return (false);

  }

}