function getElement(id){return (document.getElementById ? document.getElementById(id) : document.all[id]);}
function getStyle(obj){ if ('getComputedStyle' in window) return getComputedStyle(obj, ''); else if (document.body.currentStyle) return obj.currentStyle; else return obj.style; }
function getXmlHttpRequest(){if (window.ActiveXObject){return new ActiveXObject("Microsoft.XMLHTTP");}else if (window.XMLHttpRequest){return new XMLHttpRequest();}else{return null;}}