指定key获取对应url里边的value

api的应用场景是：指定对应的key获取url里面的value

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/*
getQuery 
@function
@param url  ----目标url
@param key ---对应的key
@example 
url = 'http://www.baidu.com/plat/view.html?platId=17;
ZYC.url.getQuery(url,'platId'); //17
*/
ZYC.url.getQuery = function(url,key){
       var svalue = url.match(new RegExp("[\?\&]" + key + "=([^\&]*)(\&?)","i"));
	 return svalue ? svalue[1] : svalue;
}