style="display:none;"

<script language="javascript">

function pysjzx_change(){

var leaseObj = document.all.id_lease; //把id為"id_lease"的元素名保存在leaseObj

var saleObj = document.all.id_sale; //把id為"id_sale"的元素名保存在saleObj

var hhObj = document.all.id_hh;

//把id為"id_hh"的元素名保存在hhObj

var pysjzx_type = document.pysjzxform.pysjzx_type.value;//這是工作把表單控件pysjzx_type的值保存到Pysjzx_type,估計很有可能是壹個下拉列表

//以下是根據Pysjzx_type來決定顯示哪個要顯示，哪個要隱藏

//style.display="block"為顯示，display="none"為隱藏

if (pysjzx_type=="sale"){saleObj.style.display = "block";leaseObj.style.display = "none";}

if (pysjzx_type=="buy"){saleObj.style.display = "block";leaseObj.style.display = "none";}

if (pysjzx_type=="lease"){leaseObj.style.display = "block";saleObj.style.display = "none";}

if (pysjzx_type=="hire"){leaseObj.style.display = "block";saleObj.style.display = "none";}

if (pysjzx_type=="cotenancy"){hhObj.style.display = "block";saleObj.style.display = "none";}

}

}