我找到了来自

 http://***.com/questions/2405355/how-to-pass-a-parameter-to-a-javascript-through-a-的解决方案url-and-display-it-a-page 

这里是灵魂：

 var GET = {}; 
 var query = window.location.search.substring（1）.split（& quot;& amp;& quot;）; 
 for（var i = 0，max = query.length; i & lt;  max; i ++）
 {
 if （query [i] ===& quot;& quot;）//检查尾随& amp; ，没有参数
 continue; 

 var param = query [i] .split（& quot; =& quot;）; 
 GET [decodeURIComponent（param [0]）] = decodeURIComponent（param [1] ||& quot;& quot;）; 
} 
用法：GET.Use_id或GET [& quot; Use_id& quot;]。您还可以使用& quot; Use_id& quot;来检查参数是否存在，即使它具有空值。在GET中（将返回true或false）。<   / pre  &GT; 跨度> 

Hi, there is a javascript function in my webpage as following :

<script type="text/javascript" language="javascript">
<!--
//initializing the WebPlayer
var u = new UnityObject2();
u.initPlugin(jQuery("#unityPlayer")[0], "Example.unity3d");

function SaySomethingToUnity(value)
{
    u.getUnity().SendMessage("GUI", "ChangeText", value);
}
-->
</script>

i want to call and send parameters to above js method " SaySomethingToUnity " as url parameter.
as an example " https://www.google.lk/search?q=test " i can pass parameter like this.

like wise i want to pass parameters into my SaySomethingToUnity js function that in eg : www.mytest.com

I was found a solution from

http://***.com/questions/2405355/how-to-pass-a-parameter-to-a-javascript-through-a-url-and-display-it-on-a-page

here is the soultion :

var GET = {};
var query = window.location.search.substring(1).split("&");
for (var i = 0, max = query.length; i < max; i++)
{
    if (query[i] === "") // check for trailing & with no param
        continue;

    var param = query[i].split("=");
    GET[decodeURIComponent(param[0])] = decodeURIComponent(param[1] || "");
}
Usage: GET.Use_id or GET[&quot;Use_id&quot;]. You can also check if a parameter is present even if it has a null value using &quot;Use_id&quot; in GET (will return true or false).</pre>