function validate(){
if ((document.contactform.name.value=="")||(document.contactform.captcha.value=="")||(document.contactform.email.value=="")||(document.contactform.iagree.checked== false)||(document.contactform.iagree.value=="")||(document.contactform.postcode.value=="")||(document.contactform.phone.value=="")){
alert ("You must fill in all of the required fields.")
return false
}
else
return true
}

function check(){
var f = document.update;
for(var i = 0; i < f.elements.length; i++){
if (f.elements[i].type != "text")continue;
var text = f.elements[i].value;
if(text == null || text.length == 0 || isNaN(text) == true){
alert("Please fill in all the quantities.");
return false;
}
}
}