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function addListener(element,e,fn){
if(element.addEventListener){
element.addEventListener(e,fn,false);
} else {
element.attachEvent("on" + e,fn);
}
}
var sort = document.getElementById("sort");
addListener(sort,"click",function(){
sort.value = "";
})
addListener(sort,"blur",function(){
sort.value = "产品搜索";
})
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企业简介