function dealHotkey() {
        if (document.forms["form1"].elements["hotkey"].value == "请输入查询关键字") {
            document.forms["form1"].elements["hotkey"].value = "";
        }
    }
function onkeyupaction() {
    if (checkIsInteger(document.forms["form1"].elements["hotkey"].value)) {
        document.forms["form1"].elements["hotkey"].style.textAlign = "right";
        document.getElementById("acreagename").innerHTML = "<font color='ffffff'>&nbsp;&nbsp;平方米&nbsp;&nbsp;</font>";
    } else {
        document.forms["form1"].elements["hotkey"].style.textAlign = "left";
        document.getElementById("acreagename").innerHTML = "";
    }
}
function checkIsInteger(str) {
    if (str == "")  return false;
    return /^(\-?)(\d+)$/.test(str);
}
function topsearch() {
    if ("请输入查询关键字" == document.forms["form1"].elements["hotkey"].value) {
        document.forms["form1"].elements["hotkey"].value = "";
    }
    return true;
}