function validate(){

var  fname, fcontact_no, fformsubject
fname= document.form1.name.value
fcontact_no= document.form1.contact_no.value
fformsubject= document.form1.formsubject.value


var from = document.form1.from.value
var pos = from.indexOf("@")
  if(pos < 0) {  
    alert("Please enter a valid E-mail Address");
    document.form1.from.focus();
    return false;
  }
	
 if(fname == "") {
  alert("You must enter your Name");
  document.form1.name.focus();
  return false;
 }
 
  if(fcontact_no == "") {
  alert("You must enter your contact no.");
  document.form1.contact_no.focus();
  return false;
 }

  if(fformsubject == "") {
  alert("You must enter your a subject");
  document.form1.formsubject.focus();
  return false;
 }

}