如何在关闭alert()弹出的窗口后 使表单中的数据保留 不重置为空？

<script language="javascript">
function datacheck() {  //数据验证并提交表单
    if(document.getElementById("sxhh").value==""){
       alert("手写货号不能为空");
   document.input1.sxhh.focus();
   return false;
    }
else if(document.getElementById("sdzmc").value==""){
    alert("送达站不能为空");
document.input1.sdzmc.focus();
return false;
}
   return true;
    input1.target="preview";
input1.action="print.asp";
var win = window.open("about:blank","preview","directorys=no,toolbar=no,status=no,menubar=no,scrollbars=no,resizable=no,width=700,height=550,top="+(window.screen.height-550)/2+",left="+(window.screen.width-700)/2+"");
win.focus();
input1.submit();
}
</script>
<body>
<form>
<input type ="submit" value="打印预览(Alt+p)"  accesskey="p"  onClick="datacheck();">
</form>这是我的代码  谁给改造一下

解决方案 »

  1.   

    <%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
    <title>无标题文档</title>
    </head>
    <script language="javascript">
    function datacheck() {  //数据验证并提交表单
        if(document.getElementById("sxhh").value==""){
           alert("手写货号不能为空");
       document.input1.sxhh.focus();
       return false;
        }
    else if(document.getElementById("sdzmc").value==""){
        alert("送达站不能为空");
    document.input1.sdzmc.focus();
    return false;
    }
       return true;
        input1.target="preview";
    input1.action="print.asp";
    var win = window.open("about:blank","preview","directorys=no,toolbar=no,status=no,menubar=no,scrollbars=no,resizable=no,width=700,height=550,top="+(window.screen.height-550)/2+",left="+(window.screen.width-700)/2+"");
    win.focus();
    input1.submit();
    }
    </script>
    <body ><form name="input1" METHOD="POST" onSubmit="document.getElementById('MaxIndex').value=Index;">
    <table>
        <tr>
        <td><div align="center" class="style1">手写货号</div></td>
        <td><input name="sxhh" type="text" id="sxhh" size="10" maxlength="10" onBlur="changejianshu();" onKeyDown="javascript:if(event.keyCode==13)event.keyCode=9"></td>
    <td><input name="sdzmc" type="text" id="sdzmc" size="15" maxlength="15" onMouseMove="this.focus()" onFocus="this.select()" onKeyDown="javascript:if(event.keyCode==13)event.keyCode=9" ></td>
    </tr>
    </table>
    <input type ="submit" value="打印预览(Alt+p)"  accesskey="p"  onClick="datacheck();">
    </form>
    </body>
    </html>
      

  2.   

    <input type ="submit" value="打印预览(Alt+p)"  accesskey="p"  onClick="return datacheck();">