function remove_param(param,query){
	if (query=='') 
		query = window.location.search;
	var regExp=new RegExp(param+"\\=\\S*?\\&","gi");
	var regExp1=new RegExp(param+"\\=\\S*$","gi");
	
	while(query.match(regExp)!=null) {
	  foundStr=query.match(regExp)[0];
	  query=query.replace(new RegExp(foundStr,"gmi"),'');
	 }
	 
	 while(query.match(regExp1)!=null) {
	  foundStr=query.match(regExp1)[0];
	  query=query.replace(new RegExp(foundStr,"gmi"),'');
	 }
	 
	 if (query.lastIndexOf("&") == query.length-1){
	 	query = query.substr(0,query.length-1);
	 }
	 return(query);
}