divDownList.innerHTML='<table id="tabList" style="width:100%" border="0" cellpadding="0" cellspacing="0">'
+'<tr><td align="right"><textarea rows=4 id=textareavalue name=textareavalue value="" style="overflow:auto;width:100%"></textarea></td></tr>'
+'<tr><td align="right"><input type="button" value="确定" onclick="insertvalue()"></td></tr></table>';
textareavalue.value=str;
divDownList.style.left=ex;
divDownList.style.top =ey;
divDownList.style.display="";
+'<tr><td align="right"><textarea rows=4 id=textareavalue name=textareavalue value="" style="overflow:auto;width:100%"></textarea></td></tr>'
+'<tr><td align="right"><input type="button" value="确定" onclick="insertvalue()"></td></tr></table>';
textareavalue.value=str;
divDownList.style.left=ex;
divDownList.style.top =ey;
divDownList.style.display="";
可是现在是自动在下一行写入。
然后读取的时候div就被撑开了