function checkform() {  
 	if (document.form1.name.value == "") {
    	alert( "Please enter Name" );
    	document.form1.name.focus();
    	return false ;
  	}
	if (document.form1.email.value == "") {
    	alert( "Please enter Email" );
    	document.form1.email.focus();
    	return false ;
  	}
	if (document.form1.phone.value == "") {
    	alert( "Please enter Phone" );
    	document.form1.phone.focus();
    	return false ;
  	}	
	if (document.form1.captcha_input.value == "") {
    	alert( "Enter CAPTCHA text to validate a human submission" );
    	document.form1.captcha_input.focus();
    	return false ;
  	}

}