function getCookie(c_name)
  {
	  if (document.cookie.length>0)
	    {
	    	c_start=document.cookie.indexOf(c_name + "=");
	    	if (c_start!=-1)
		      {
		      c_start=c_start + c_name.length+1;
		      c_end=document.cookie.indexOf(";",c_start);
		      if (c_end==-1) c_end=document.cookie.length;
		      return unescape(document.cookie.substring(c_start,c_end));
		      }
	    }
	  	return "";
  }
function eraseCookie(c_name ) 
{
	var date = new Date();
	date.setTime(date.getTime()+(-10*24*60*60*1000));
	var expires = "; expires="+date.toGMTString();	
	document.cookie = c_name+"=''"+expires+"; path=/";	
}