function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function autoCentrada(miPagina,nombrePagina,w,h,scroll){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable=no'
win = window.open(miPagina,nombrePagina,settings)
win.focus();
}
document.numCab= 10;
function cargarCab(){
/*	var img  = MM_findObj("imgCab");
	var rand= Math.round(Math.random()*	(document.numCab));
	var src_old= img.src;
	var src_new = src_old.replace("_01","_01_"+rand); 
	//alert(rand+"--"+src_new)	
	img.src= src_new;*/
}
document.numCabHome= 10;
function cargarCabHome(){
	var img  = MM_findObj("imgCab");
	var rand= Math.round(Math.random()*	(document.numCabHome));
	var src_old= img.src;
	var src_new = src_old.replace("_01","_01_"+rand); 
	//alert(rand+"--"+src_new)	
	img.src= src_new;
}