var params = window.location.search;
 var bg = "home";
 
 if(params.indexOf('menu')!=-1){
	  
	  var a = [];
	  a = params.split('&');
	  var b = [];
	  for(i in a){
		  if(a[i].indexOf('menu')!=-1){
			  b = a[i].split('=');
		  };
	  }
	  bg = b[1];	  
	 
 }
 jQuery(document).ready(function(){
	 var mb = document.getElementById('mainbody');
	 
	 if(navigator.userAgent.indexOf('MSIE')!== -1)
		 mb.setAttribute('className', "bg_"+bg);
	 else
		 mb.setAttribute('class', "bg_"+bg);		 
 
 });