function liuyan_close(){
	document.getElementById("liuyan_div").style.display="none"
}
function liuyan_show(){
	document.getElementById("liuyan_div").style.display="block"
}
function check_liuyan(){
	if(document.liuyan.liuyanvalue.value==""||document.liuyan.liuyanvalue.value.length>500){
		alert("ÁôÑÔÎª¿Õ»ò¹ý³¤")
		return false
	}
	liuyan_close()
	return true
}
function down(page){
page.style.top="2px"
page.style.left="1px"
}
function up(page){
page.style.top="0px"
page.style.left="0px"
}