// JavaScript Document
function setRes(){
	var cuerpo=document.getElementById("mainBody")
	var scrH = screen.height;
	var bFilePath = "imatges/";
	var bFile= new String();
	switch(scrH){
		case 768:
			bFile ="fondoPantalla768.gif";
			break;
		case 1024:
			bFile ="fondoPantalla1024.gif";
			break;
		case 1050:
			bFile ="fondoPantalla1050.gif";
			break;
		case 1200:
			bFile ="fondoPantalla1200.gif";
			break;
	}
	document.body.style.background ="url("+bFilePath+bFile+")"
}