js獲取當前url參數

function request(paras){ 

var url = location.href; 

var paraString = url.substring(url.indexOf("?")+1,url.length).split("&");

var paraObj = {} 

for (i=0; j=paraString[i]; i++){ 

paraObj[j.substring(0,j.indexOf("=")).toLowerCase()] = j.substring(j.indexOf("=")+1,j.length); 

}  

var returnValue = paraObj[paras.toLowerCase()];

if(typeof(returnValue)=="undefined"){ 

return "1"; 

}else{ 

return returnValue; 

}