JavaScript in Document.getelementsbyclassname compatibility encapsulation method one

varGetelmsbyclsname =function(ClassName, results) {results= Results | | []; //determine if the browser supports Getelementsbyclassname            if(document.getelementsbyclassname) {//browsers support this methodresults.push.apply (Results, Document.getelementsbyclassname (className)); } Else {                //Browser does not support                //implementation: Gets the elements of the page through the class name                //Ideas:                //1 Get all the elements through the tag name                //2 loops through all the acquired elements, judging whether the current element has no specified class                //1 Getting all the elements in the page                varnodes = document.getElementsByTagName ("*"); //2 times Calendar                 for(vari = 0; i < nodes.length; i++) {                    varCnodes =Nodes[i]; ///2.1 Determines whether the current element contains the specified class ClassName//The first way://1 Gets the class name to the current element classname/getattribut                    E ("class")///2 will get the class name separated by a space to produce an array//["C1", "C2", "C3"] 3 use each element in the array to compare with classname//4 if it is in accordance with the requirements, put it in results var cnodeclsname = Cnodes.class                    Name;                    var clsnames = Cnodeclsname.split ("");                            for (var j = 0; J < Clsnames.length; J + +) {if (clsnames[j] = = = ClassName) {                        Results.push (Cnodes); }                    }                }            }                        returnresults; };

JavaScript in Document.getelementsbyclassname compatibility encapsulation method one