document.getElementById('paper_con_ref'); var oBtn = document.getElementById('more'); var allContent = oP.innerHTML; //存放所有内�? oP.innerHTML = oP.innerHTML.substr(0,500); //截取�?00个字�? oBtn.onclick=function(){ oP.innerHTML = allContent; //显示所有内�? over = document.getElementById("more"); over.innerHTML = "End"; var more = document.getElementById("more"); more.disabled=true; }
 
 
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