if (document.getElementById){
document.write('<style type="text/css">\n')
document.write('.dropcontent{display:none;}\n')
document.write('</style>\n')
}

function contractall(){
if (document.getElementById){
var inc=0
while (document.getElementById("dropmsg"+inc)){
document.getElementById("dropmsg"+inc).style.display="none"
inc++
}
}
}

function expandone(){
	if (document.getElementById){
		var selectedItem=document.dropmsgform.dropmsgoption.selectedIndex
		contractall()
		document.getElementById("dropmsg"+selectedItem).style.display="block"
	}
}

if (window.addEventListener)
window.addEventListener("load", expandone, false)
else if (window.attachEvent)
window.attachEvent("onload", expandone)

// hien thi video 
function ham(id, video) {
	var s1 = new SWFObject("player.swf","ply","234","198","9","#FFFFFF");
	s1.addParam("allowfullscreen","true");
	s1.addParam("allowscriptaccess","always");
	s1.addParam("flashvars","file="+video+"&image=preview.jpg");
	s1.write(id);
}

function clip_gioithieu_dg(id,video) {
	var s1 = new SWFObject("player.swf","ply","234","198","9","#FFFFFF");
	s1.addParam("allowfullscreen","true");
	s1.addParam("allowscriptaccess","always");
	s1.addParam("flashvars","file="+video+"&image=preview.jpg");
	s1.write(id);
}