console
<div name="didc_fold_all"id="didc_fold_all"style="width:100%;height:auto;min-height:200px;background-color:##efefef;position: relative;overflow:hidden;"contenteditable="false"><div id="didc_fold_text" style="margin:20px"><div>这里输入内容....</div></div><div id="didc_fold"style="position: absolute;bottom: 0;text-align: center;padding: 2px;background: -webkit-linear-gradient(top,#ffffff00,#ededed) no-repeat;width: 100%;"><button id="didc_fold_button"style="background-color: white;border: 0;border-radius: 30px;padding: 5px 10px 5px 10px;"onclick="didc_fold()">展开全部</button></div></div>
<script type="text/javascript">
var fold_tmp=""
var didc_fold_all=document.getElementById("didc_fold_all")
var didc_fold_button=document.getElementById("didc_fold_button")
var didc_fold=document.getElementById("didc_fold")
didc_fold_all.height="200px"
didc_fold=function(){
if(fold_tmp==""){
didc_fold_all.style.height="auto"
didc_fold_button.innerHTML="收起段落"
fold_tmp=2;
}else if(fold_tmp=="2"){
didc_fold_all.style.height="200px"
didc_fold_button.innerHTML="展开全部"
fold_tmp=""
}
}
</script>