function evalidate()
  {
    var N=  document.emailfrm.nametxt.value;
    var E = document.emailfrm.emailtxt.value;
    var C = document.emailfrm.contenttxt.value; 

               if(N =="")
			   { alert("Please enter name");
			   document.emailfrm.nametxt.focus();
               return false ;   
			   }
         
			   if(E =="")
			   { alert("Please enter  Email ID");
			   document.emailfrm.emailtxt.focus();
               return false ;   }
			   
		  if (E.length > 0 ) 
              { 
                var a="@";
                var d=".";
				}
				
             if (E.indexOf(a)==-1 || E.indexOf(a)==0 || E.indexOf(d)==-1 || E.indexOf(d)==0 )
                {
                 alert("Inavlid email id, please enter valid email");
                 
                 document.emailfrm.emailtxt.focus();
                 return false;
                }
				
			   if(C =="")
			   { alert("Empty content, Please enter");
			   document.emailfrm.contenttxt.focus();
               return false ;   }
			  
			    return true;
 }