function check()
  {
                            if(document.contact.textfield.value=="")
	                                   {
	                                       alert("Enter your name");
		                                    return false;
	                                    }
	                        if (document.contact.textfield.value==" ")
	                                    { 
		                                alert("Enter valid name");
		                                 return false;
		                                 }
		   
		   if(document.contact.textfield2.value=="")
				           {
						     alert("Please Specify Your Email Id.");
		               //document.getElementById("email_chk").innerHTML ="Please Specify Your Email Id.";
		               return false;
						   }
		   
		   
		   if(document.contact.textfield2.value!="")
				 {
					// document.write("urvesh");
		             var str=document.contact.textfield2.value;
	  	             var filter=/^.+@.+\..{2,3}$/;
		                   if(!filter.test(str))
						   {   
						       alert("Not a Valid Email Id. Please Enter a Valid Email Id.");
			                   //document.getElementById("email_chk").innerHTML ="Not a Valid Email Id. Please Enter a Valid Email Id.";
			                    return false;
		                   }
						   
							
	             }
		   return true;
}