// celda
var ns4 = (document.layers)?true:false 
var ie4 = (document.all)?true:false 
if(ie4){ 
    document.write("<link rel='stylesheet' href='css/estilos_ie.css'>") 
}else{ 
    document.write("<link rel='stylesheet' href='css/estilos_ns.css'>") 
} 
function overTD(td,color){td.bgColor=color;} 
function outTD(td,color){td.style.cursor='default';td.bgColor=color;} 
function clickTD(td){td.children.tags('A')[0].click();} 
// abreventana
 
 function abreventana(url, name, w, h, perc) {

        var winX = (screen.availWidth - w)*perc*.01;

        var winY = (screen.availHeight - h)*perc*.01;

        popupWin = window.open(url, name,'toolbar=0,location=0,directories=0,status=yes,menubar=0,scrollbars=0,resizable=0,width=' + w + ',height=' + h + ',left=' + winX + ',top=' + winY);

}