// I4 JavaScript Document
function aumentaDivCentro() {
	var obj = document.getElementById('centro');
	try {
		if (obj.offsetHeight < 500)		
				obj.style.height = "500px";

	}
	catch (e) {
		return false;
	}
	
}

function abrir(name) {
// Abre uma página em uma nova janela
  icone = window.open('' + name,'_blank','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,width=790,height=520,left=0,top=0,maximized=yes');
}

mostraMenu = function (div,div2) {
	
	dget  = document.getElementById(div);
	dget2 = document.getElementById(div2);
	//ddiv  = dget2.style.display;
	dtop  = dget.offsetHeight + dget.offsetTop;
	
	//if ((ddiv == "") || (ddiv == "none")) {
		
		dget2.style.offsetTop = "100px";
		//dget2.style.display = "visible";
		dget2.style.visibility = "visible";
		dget2.style.display = "visible";
			
	//}
		
}

function opacity(id, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;

    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
} 

function showMenu(divid) { 
	document.getElementById(divid).style.visibility='visible';
}
function hideMenu(divid) { 
	document.getElementById(divid).style.visibility='hidden';
}