자바스크립트로 Get방식 파라미터 받아오기

 // request로 imgUrl 받기  

 var Request = function()
 {
     this.getParameter = function( name )
     {
         var rtnval = '';
         var nowAddress = unescape(location.href);
         var parameters = (nowAddress.slice(nowAddress.indexOf('?')+1,nowAddress.length)).split('&');
 
         for(var i = 0 ; i < parameters.length ; i++)
         {
             var varName = parameters[i].split('=')[0];
             if(varName.toUpperCase() == name.toUpperCase())
             {
                 rtnval = parameters[i].split('=')[1];
                 break;
             }
         }
         return rtnval;
         //document.write( rtnval );
     }
 }
 var request = new Request();
 var imgUrl = request.getParameter('imgUrl');