function init(){

	document.getElementById("inst").onmouseover = function(){
		document.getElementById("subInstitucional").style.display = 'block';
	}; 
	document.getElementById("inst").onmouseout = function(){
		document.getElementById("subInstitucional").style.display = 'none';
	}; 
	document.getElementById("subInstitucional").onmouseout = function(){
		document.getElementById("subInstitucional").style.display = 'none';
	}; 
	document.getElementById("subInstitucional").onmouseover = function(){
		document.getElementById("subInstitucional").style.display = 'block';
	};

}
window.onload=init