function checkform(thisform) {

if (thisform.txtname.value == '') {
alert("Please enter your NAME.");
thisform.txtname.focus();
return false;
}

if (thisform.txtemailaddress.value == ""){
    alert("Please enter your E-MAIL ADDRESS");
    checkerror = 1;
		thisform.txtemailaddress.focus();
    return false;
  }else{
    var eadd = "";
    var eadd = thisform.txtemailaddress.value;
    var foundeadd = "";
    var foundeadd1 = "";
    for (j = 0; j < eadd.length; j++){
      if ((eadd.substring(j,j+1) == "@")){
        foundeadd = "Found";
      }
      if ((eadd.substring(j,j+1) == ".")){
        foundeadd1 = "Found";
      }
    }
    if (foundeadd != "Found" && foundeadd1 != "Found"){
      alert("Your E-MAIL address is invalid!");
      checkerror = 1;
  		thisform.txtemailaddress.focus();
      return false; 
    }
  }
  
	}