JS获取url参数

<pre name="code" class="javascript">
function getParam(url){ var index = url.indexOf("?");if (index < 1){return null;}else{var paraString = url.substring(index+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); } return paraObj;} }