function lletres(objpath)
{
var win1_2=open(objpath,"win1_2",'scrollbars=auto,location=no,resizable=no,left=10,top=10,width=350px,height=350px');
}

function historia(objpath)
{
var win2_2=open(objpath,"win2_2",'scrollbars=auto,location=no,resizable=no,left=10,top=10,width=500px,height=335px');
}
function compra(objpath)
{
var win2_2=open(objpath,"win2_2",'scrollbars=auto,location=no,resizable=auto,left=10,top=10,width=800px,height=500px');
}