var objPage = null;
	/*set the set for the sub sections that are not the default content*/
	function showDiv(id) {
        if (objPage) objPage.style.display = 'none';
        objPage=document.getElementById(id);
        objPage.style.display = 'block';
        }
    /*use this function to close to the default content*/
	function closeDiv(id){ 
	var objPage2 = document.getElementById(id).style.display= '';
	if (objPage2 == ''){
	objPage1=document.getElementById(id);
	objPage1.style.display = 'none';
	}
	}