1 var get = { 2 byId: function(id) { 3 return document.getElementById(id) 4 }, 5 byClass: function(sClass, oParent) { 6 var aClass = []; 7 var reClass = new RegExp("(^| )" + sClass + "( |$)"); 8 var aElem = this.byTagName("*", oParent); 9 for (var i = 0; i < aElem.length; i++) reClass.test(aElem[i].className) && aClass.push(aElem[i]); 10 return aClass 11 }, 12 byTagName: function(elem, obj) { 13 return (obj || document).getElementsByTagName(elem) 14 } 15 };