// JavaScript Document
function validar(){

if(document.form1.texto.value==""){
alert("Por favor ingrese un criterio de búsqueda");
document.form1.texto.focus();
return false;

}
else
return true;


}


function NewWindow(mypage,myname,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(mypage,myname,settings)
}