JavaScript实现页面间传值的两种方案

方案一：URL传参与解析

<html>
<head>
  <title> demo </title>
  <meta name="Author" content="xugang" />
  <script type="text/javascript">
  function foo(){
   var a ="abc"; // a为变量值
   var str = "b.html?id="+a+";";
   //alert(document.frm.action);
   //方案一（无效）
   // document.frm.action = str;
   //方案二（无效）
   // window.location.href = str;
   //方案三（有效）
   window.location.replace(str);
   return false;
  }
 </script>
</head>
<body>
   <FORM name="frm" method="get" 
   onsubmit = "return foo()" >
      <INPUT TYPE="SUBMIT" />
   </FORM>
</body>
</html>

var getQueryString = function(name) {
  var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
  var r = window.location.search.substr(1).match(reg);
  if (r != null) return r[2]; return "";
}

方案二：表单隐藏域传参

function foo(){ 
    var str = "abc"; 
    //document.forms[0].hid.value = str; 
    var frm = window.event.srcElement; 
    frm.hid.value = str; 
    return true; 
}

<html> 
<head> 
 <title> demo </title> 
 <meta name="Author" content="xugang" /> 
 <script src="myjs.js"></script> 
</head> 
<body> 
 <FORM name="frm" METHOD="get" ACTION="b.html" 
 onsubmit="return foo()"> 
  <INPUT TYPE="hidden" id="hid" name="hid"> 
  <INPUT TYPE="submit" value="提交"> 
 </FORM> 
</body> 
</html>

<HTML> 
 <HEAD> 
  <TITLE> New Document </TITLE> 
 </HEAD> 
 <BODY> 
  <SCRIPT LANGUAGE="JavaScript"> 
   document.write(decodeURIComponent(location.search.substr(3)));
  </SCRIPT> 
 </BODY> 
</HTML>