从url获取指定参数值，获取当前url上下文-蒲公英云

从url获取指定参数值，获取当前url上下文

1.从url获取指定参数值

function requestParam(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 "";  
    }else{ 
        return returnValue; 
    }
}

2.获取url上下文

function getContext() { 
    var url = window.location.href;
    var ret = "/";
    if (url.indexOf("http://") != -1) {
        var hoststr = url.substr(7, url.length - 7);
        var index = hoststr.indexOf("/");
        if (index > 0) {
            var context = hoststr.substr(index + 1, hoststr.length - (index + 1));
            index = context.indexOf("/");
            if (index < 0) {
                ret += context;
            } else {
                context = context.substring(0, index);
                ret += context;
            }
        }
        ret = "http://" + hoststr.substring(0, hoststr.indexOf("/")) + ret;
    }
    return ret;
}//返回值类似：http://171.14.14.118:9494/itemss