//--------------------------------------------------------------------------------------------------------------------
function validacampos(){
if(document.formu_pagerank.dominio.value==""){ 
alert("INGRESE EL NOMBRE DE DOMINIO");
document.formu_pagerank.dominio.focus();
return;
} 
if ((document.formu_pagerank.dominio.value.indexOf ('.', 0) ==-1)||(document.formu_pagerank.dominio.value.length < 5)){ 
alert('NOMBRE DE DOMINIO INVALIDO'); 
document.formu_pagerank.dominio.focus();
return ; 
}
document.formu_pagerank.S1.value  = "";
document.formu_pagerank.submit();
}
//-----------------------------------------------------------------------------------------------------------