为指定表单Form追加一个input
<script language="javascript">
var file = document.createElement("input");
file.name = "newInput";
file.type = "hidden";
file.value = "";
file.onchange = function(){ FileCheck(file); }
document.getElementById("Form").appendChild(file);
</script>
为表单的指定select添加option
<script language="javascript">
var sel = document.getElementById("toplist");
var op = document.createElement("OPTION");
op.value = "0";
op.innerHTML = "二手供应信息";
sel.appendChild(op);
var op = document.createElement("OPTION");
op.value = "1";
op.innerHTML = "二手求购信息";
sel.appendChild(op);
</script>