function specOpen(smallDiv, specsDiv ) {
	document.getElementById(smallDiv).className = 'smallInvisible';
	document.getElementById(specsDiv).className = 'specsVisible';
}

function specClose(smallDiv, specsDiv ) {
	document.getElementById(smallDiv).className = 'smallVisible';
	document.getElementById(specsDiv).className = 'specsInvisible';
}

function johnDeereCalculator(){
	window.open("http://quikcalc.deere.com/JDCQuikCalc/servlet/QuikCalcServlet?businessline=construction","Window1", "menubar=no,width=560,height=590,toolbar=no,scrollbars=no,resizeable=yes");
}

function mailFormCheck(form){

	var errorMessage = "Please \n";
	var noErrors = "true";
	var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;

	if(form.name.value == ""){
		errorMessage += " enter your name \n";
		noErrors = "false";
	}
	
	if(form.email.value == ""){
		errorMessage += " enter your email address \n";
		noErrors = "false";
		
	}

	if(form.confirm.value == ""){
		errorMessage += " enter a confirmation of your E-mail address \n";
		noErrors = "false";
		
	}

	if(form.question.value == ""){
		errorMessage += " ask a question \n";
		noErrors = "false";
		
	}
	
	if(form.email.value != form.confirm.value){
		errorMessage = " make sure that your e-mails match \n";
		noErrors = "false";
	}
	
	if(!filter.test(form.email.value)){
		errorMessage += " enter a valid E-mail address \n";
		noErrors = "false";
		
	}
	
	if(noErrors == "true"){
		return true;
	} else {
		alert(errorMessage);
		return false;
	}

}