为什么这个无效时不聚焦，检查很久，没查出哪错了

Question

window.onload=initForm;

function initForm(){

for(var i=0;i<document.forms.length;i++){

     document.forms[i].onsubmit=function(){return validForm();}

}

}

function validForm(){

var allGood=true;

var allTags=document.getElementsByTagName("*");

for(var j=0;j<document.allTags.length;j++){

if(!validTag(allTags[j])){

allGood=false;

}

}

return allGood;

function validTag(thisTag){

var outclass=" ";

var allClass=thisTag.className.split(" ");

for(var k=0;k<allClass.length;k++){

outclass+=basic(allClass[k])+" ";

}

}

thisTag.className=outclass;

if(outclass.indexOf("invalid")>-1){

this.focus();

if(thisTag.nodeName=="INPUT"){

this.select();

}

return false;

}

return true;

function basic(thisClass){

var classback=" ";

switch(thisClass){

case " ":

case "invalid":

break;

case "password1":

if(allGood&&thisTag.value==""){

classback="invalid ";

}

classback+=thisClass;

break;

default:

  classback+=thisClass;

}

return classback;

}

}

Answer 1

没有页面结构赛，这位道友