function check_fun(){
	var f = document.getElementById("inquiries");

	if(!f.company.value){
		alert("Please type a company name!");
		f.company.focus();

		return false;
	}else if(!f.address.value){
		alert("Please type a company address!");
		f.address.focus();

		return false;
	}else if(!f.telephone1.value){
		alert("Please type your telephone number!");
		f.telephone1.focus();

		return false;
	}else if(!f.telephone2.value){
		alert("Please type your telephone number!");
		f.telephone2.focus();

		return false;
	}else if(!f.telephone3.value){
		alert("Please type your telephone number!");
		f.telephone3.focus();

		return false;
	}else if(!f.telephone4.value){
		alert("Please type your telephone number!");
		f.telephone4.focus();

		return false;
	}else if(!f.email.value){
		alert("Please type your e-mail address!");
		f.email.focus();

		return false;
	}else if(isemail(f.email.value) == false){
		alert("Please type your e-mail address in the\nfollowing format:\nyourname@example.com.");
		f.email.focus();

		return false;
	}else if(f.profile_file.value != "" && !attach_fun(f.profile_file.value)){
		alert("Ultracapacitor System Working Profile Format : doc / ppt / pdf");
		f.profile_file.focus();
		return false;
	}else{
		return true;
	}
}

function isemail(e){
	return e.search(/^\s*[\w\~\-\.]+\@[\w\~\-]+(\.[\w\~\-]+)+\s*$/g)>=0;
}

function attach_fun(file){
    var extArray = new Array(".doc", ".ppt", ".pdf");
    var allowSubmit = false;

    while(file.indexOf("\\") != -1)
    file = file.slice(file.indexOf("\\") + 1);
    ext = file.slice(file.indexOf(".")).toLowerCase();

	for(var i = 0;i < extArray.length; i++){
		if(extArray[i] == ext){
			allowSubmit = true;
		}
    }

    return allowSubmit;
}