获取地址栏参数

_GetQueryString (paraName) {

let url = decodeURI(document.location.toString())

let arrObj = url.split('?')

if (arrObj.length > 1) {

let arrPara = arrObj[1].split('&')

let arr

for (let i = 0; i < arrPara.length; i++) {

arr = arrPara[i].split('=')

if (arr != null && arr[0] === paraName) {

return arr[1]

}

}

return ''

} else {

return ''

}

}