function centrarPagina()
{
	var tamX= window.screen.Width;
	
	
	switch(tamX)
	{
		case 800:
			principalLayer.style.left= "0px";
			break;
		case 1024:
			principalLayer.style.left= "100px";
			break;
	}
	
	principalLayer.style.visibility= "visible";
	myFlash.style.visibility= "visible";
}


function myResize()
{
	var tamy= screen.Height;
	var tamx= screen.Width;

	
	myLayer.style.top= (tamy/2)- 300;
	if(myLayer.style.top < 0)
		myLayer.style.top= 0;
	myLayer.style.left= (tamx/2) - 400;
	if(myLayer.style.left < 0)
		myLayer.style.left= 0;


	switch(screen.Width)
	{
		case 800:
			myBody.style.backgroundImage= "url(images/backg_770x5.gif)";
			break;
		case 1024:
			myBody.style.backgroundImage= "url(images/background1024.jpg)";
			break;
	}
	
	myLayer.style.visibility= "visible";
} 

function popup (url,name,w,h)
{
	var handle;
	handle=window.open(url,name,"toolbar=no,height="+h+",width="+w);
}



function muestraCapa( ) {
	coche.style.visibility= "visible";
	csuperior.style.visibility= "visible";
	cinferior.style.visibility= "visible";
	}