ie6 0官方下载

querySelector和querySelectorAll在IE6和IE7下的兼容性问题

if(!electorAll){

electorAll=function(selectors){

varstyle=Element('style'),elements=[],element;

Child(style);

document._qsa=[];

t=selectors+'{x-qsa:expression(document._qsa&&document._(this))}';

By(0,0);

Child(style);

while(document._){

element=document._();

Attribute('x-qsa');

(element);

}

document._qsa=null;

returnelements;

};

}

if(!elector){

elector=function(selectors){

varelements=electorAll(selectors);

return()?elements[0]:null;

};

}

//⽤于在IE6和IE7浏览器中，⽀持electorAll⽅法

varqsaWorker=(function(){

varidAllocator=10000;

functionqsaWorkerShim(element,selector){

varneedsID===="";

if(needsID){

++idAllocator;

="__qsa"+idAllocator;

}

try{

electorAll("#"++""+selector);

}

finally{

if(needsID){

="";

}

}

}

functionqsaWorkerWrap(element,selector){

electorAll(selector);

}

//Returntheonethisbrowserwantstouse

Element('div').querySelectorAll?qsaWorkerWrap:qsaWorkerShim;

})();