getElementsByTagName('*')報錯
function?getByClass(clsName,parent){
??var?oParent=parent?document.getElementById(parent):document,
??????eles=[],
??????elements=oParent.getElementsByTagName('*');
??for(var?i=0,l=elements.length;i<l;i++){
????if(elements[i].className==clsName){
??????eles.push(elements[i]);
????}
??}
??return?eles;
??//chrome一直說什么can't?read?property?of'getElementsByTagName'of'null'??????
