function init(){
	
	document.getElementById("btn_prod").onmouseover = function(){document.getElementById("submenu").style.display = 'block';}; 
	document.getElementById("btn_prod").onmouseout = function(){document.getElementById("submenu").style.display = 'none';}; 
	document.getElementById("submenu").onmouseout = function(){document.getElementById("submenu").style.display = 'none';}; 
	document.getElementById("submenu").onmouseover = function(){document.getElementById("submenu").style.display = 'block';};
	
}

window.onload=init