// JavaScript Document
/*function open_window(bcode){
		w=window.open("../student/book_detail.php?bcode="+bcode+"",null,"height=370,width=620,status=yes,toolbar=no,menubar=no,location=no");
		w.focus();
		
}*/
function show_menu(id,body_name,leftpos){
	hide_menu();
	body_width=document.getElementById(body_name).clientWidth;
	extra_space=0;
	//**To add extra_space to each menu when body width is bigger than 780.
	if(body_width>780){
		extra_space=(body_width-780)/2;
	}	
	menu=document.getElementById(id);
	menu.style.left=(""+(leftpos+extra_space)+"px");
	menu.style.top=(""+134+"px");	
	menu.style.visibility='visible';
	
	//alert(extra_space);
}

function hide_menu()
{	
	menu=document.getElementById('menu1');
	menu.style.visibility='hidden';
	menu=document.getElementById('menu2');
	menu.style.visibility='hidden';
	menu=document.getElementById('menu3');
	menu.style.visibility='hidden';
	menu=document.getElementById('menu4');
	menu.style.visibility='hidden';
	menu=document.getElementById('menu5');
	menu.style.visibility='hidden';
	
	menu=document.getElementById('m_menu1');
	menu.className='menu';
	menu=document.getElementById('m_menu2');
	menu.className='menu';
	menu=document.getElementById('m_menu3');
	menu.className='menu';
	menu=document.getElementById('m_menu4');
	menu.className='menu';
	menu=document.getElementById('m_menu5');
	menu.className='menu';
	
}

function test(obj,x){
	//var x=100;
	obj.style.visibility='visible';
	obj.style.zIndex=2;
	obj.style.top=(""+x+"px"); 
	//obj.style.left='200px';
	//alert(""+x+"dadf");
}