How and tips to use Split in Javascript

I rarely used the Split method before, and today I found some information.
How to use: myArray=("|")
Description: "|" is the cutting feature character, string is the string to be cut, myArray is the cutting result (stored in an array), use the method myArray[n], n=.
At first I used the thinking in asp to consider how to get the maximum subscript of myArray. It is definitely not Ubound(myArray). I searched for a long time but couldn't find it. Finally, I found out that in Javascript, arrays have a length attribute, -1, which is the maximum subscript of myArray array. It's very simple. It's really easy to think about it, but it's really difficult to think about it.
Let’s take a look at an example using split: use javascript to obtain address bar parameters.

Copy the codeThe code is as follows:

<script language="JavaScript">  
<!--  
function Request(strName)  
{  
var strHref = "/?a=1&b=1&c=Split instance";
var intPos = ("?");  
var strRight = (intPos + 1);  
var arrTmp = ("&");  
for(var i = 0; i < ; i++)  
{  
var arrTemp = arrTmp[i].split("=");  
if(arrTemp[0].toUpperCase() == ()) return arrTemp[1];  
}  
return "";  
}  
alert(Request("a"));  
alert(Request("b"));  
alert(Request("c"));  
//-->  
</script> 

There is another way to obtain address bar parameters, regular expression:

Copy the codeThe code is as follows:

<script>  
 = function(name)  
{  
var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");  
var r = (("\?")+1).match(reg);  
if (r!=null) return unescape(r[2]); return null;  
}  
var str = "/?a=1&b=1&c=Split instance";
alert(("a"));  
alert(("b"));  
alert(("c"));  
</script> 