function getEl(id){
	if(document.getElementById(id)){
		return 	document.getElementById(id);
	}
}
function setActiveMenuListItem(num){
	var name = "menuListLines";
	var count = getEl("corner3").getElementsByTagName("div").length;
	for(i=1;i<count+1;i++){
		if(i == num){
			getEl(name+i).style.visibility = "visible";	
		}
	}
}
function setPassiveMenuListItem(num){
	var name = "menuListLines";
	var count = getEl("corner3").getElementsByTagName("div").length;
	for(i=1;i<count+1;i++){
		if(i == num){
			getEl(name+i).style.visibility = "hidden";	
		}
	}
}
function setActiveMenuListItemFull(num){
	var name = "menuListLines";
	var count = getEl("corner3").getElementsByTagName("div").length;
	for(i=1;i<count+1;i++){
		if(i == num){
			getEl(name+i).style.visibility = "visible";	
		}
		else{
			getEl(name+i).style.visibility = "hidden";
		}
	}
}

<!-- for table roll over effect -->
window.onload = setRollOver;
function setRollOver(){
	var count = 22;
	var tab;
	for(i=1;i<count;i++){
		tab = document.getElementById("tab_arenda"+i);
		if(tab){
			for(j=0;j<tab.getElementsByTagName("tr").length;j++){
				tab.getElementsByTagName("tr")[j].onmouseover = function(){doTRover(this);}
				tab.getElementsByTagName("tr")[j].onmouseout = function(){doTRout(this);}
			}
		}
	}
}
function doTRover(tr){
	tr.style.backgroundColor = "#F0F2F4";	
}
function doTRout(tr){
	tr.style.backgroundColor = "";	
}