function validate(doc)
{
    function blank(doc)
    {
          str = "";
	  if(doc.name.value == "")
	    {
	      str += "Please enter your Name \n"
	    }    
	   
          if(doc.email.value == "")
	   {
	     str += "Please enter your Email Address \n"
           }                                     
               if(doc.email.value != "")    	    	
	       	{    	  
	       		if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(doc.email.value))) 
	       		   {
	       			str += "Please enter valid Email Address.\n"
	       		   }	   
 	         }
	 if(doc.web.value == "")
	    {
	      str += "Please enter your Website URL \n"
	    }                
	 if(doc.country.value == "")
	    {
	      str += "Please enter your Country \n"
	    }       
	 if(str)
	  {	   
	    alert(str);	    
	     return false;   
          }
          else
          {
          return true;                
          }
    } 
    
     if(!blank(doc))
       {
        return false;
       }           
  }