列表显示时，当数据不足pageSize时，自动补充空行JS

function initList(perPageSize){//alert(perPageSize);var listTable=document.getElementById("listTable");    var rowLength = listTable.rows.length;    //alert("rowLength"+rowLength);    if( rowLength<=perPageSize ){        for( var i=0 ; i<perPageSize-rowLength ; i++ ){        //alert("ddd");            var rowObj = listTable.insertRow();            rowObj.className="c";            for( var j=0 ; j<listTable.rows[ 0 ].cells.length ; j++ ){            //alert("xxx");                var cellObj=rowObj.insertCell();                cellObj.style.height="24";                //cellObj.innerHTML="ASDG";            }        }    }}