function ChkValidate() {
    var vartxterr = "Please check the following list:\n";
    k = 0;
    if (document.Form1.txtName.value == "") {
     vartxterr = vartxterr + " - First name must not be Blank, please re-enter.\n";
    k = k+1;
    }
    if (document.Form1.txtLastname.value == "") {
      vartxterr = vartxterr + " - Last name must not be Blank, please re-enter.\n";
      k = k+1;
    }
    if (document.Form1.txtEmail.value == "") {
      vartxterr = vartxterr + " - Email address must not be Blank, please re-enter.\n";
      k = k+1;
    }
    else{
    if (!isEmail(document.Form1.txtEmail.value)) {
			vartxterr = vartxterr + " - Email Address is invalid, please re-enter.\n";
			k = k+1;
		}
    }
   
    if (document.Form1.txtMessage.value == "") {
      vartxterr = vartxterr + " - Message must not be Blank, please re-enter.\n";
      k = k+1;
    }
    if (k != 0) {
     alert(vartxterr);
    }
    else {
	 document.Form1.hidsave.value = "pass";
     document.Form1.submit();
    }
   }