function id(id) {
	return document.getElementById(id);
}

function createAJAX()
{
	var xmlhttp;
	if (window.XMLHttpRequest)
		xmlhttp = new XMLHttpRequest();
	else if (window.ActiveXObject)
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	else
		alert("Your browser does not support XMLHTTP!");
	return xmlhttp;
}

bajuda = new Image();
bajuda.src = "../../img/index/menu_left/ajuda.png";

bajuda2 = new Image();
bajuda2.src = "../../img/index/menu_left/ajuda1.png";

function canvia_ajuda(control)
{
	if(!document.layers)
	{
   		if(control)
		{
			document.getElementById('img_ajuda').src = bajuda2.src;
		}
        else
		{       
 			document.getElementById('img_ajuda').src = bajuda.src;
		}
    }
}