// 判断参数是否存在functionisEmpty(v){switch(typeof v){case'undefined':returntrue;case'string':if(v.replace(/(^[ \t\n\r]*)|([ \t\n\r]*$)/g,'').length ==0)returntrue;break;case'boolean':if(!v)returntrue;break;case'number':if(0=== v ||isNaN(v))returntrue;break;case'object':if(null=== v || v.length ===0)returntrue;for(var i in v){returnfalse;}returntrue;}returnfalse;}// 获取url中的参数functiongetUrlParam(name){var reg =newRegExp("(^|&)"+ name +"=([^&]*)(&|$)");//构造一个含有目标参数的正则表达式对象var r = window.location.search.substr(1).match(reg);//匹配目标参数if(r !=null)returnunescape(r[2]);returnnull;//返回参数值}