// JavaScript Document function change(id, newClass) { identity=document.getElementById(id); identity.className=newClass; } function toggleBox(szDivID, iState) // 1 visible, 0 hidden { if(document.layers) //NN4+ { document.layers[szDivID].visibility = iState ? "show" : "hide"; } else if(document.getElementById) //gecko(NN6) + IE 5+ { var obj = document.getElementById(szDivID); obj.style.visibility = iState ? "visible" : "hidden"; obj.style.display = iState ? "block" : "none"; } else if(document.all) // IE 4 { document.all[szDivID].style.visibility = iState ? "visible" : "hidden" document.all[szDivID].style.display = iState ? "block" : "none"; } } function checkEmail() { if(document.signupEmails.email.value == "") { alert("Your have not entered an email address"); } else if(document.signupEmails.email.value.indexOf('@') < 0) { alert("Your email address does not contain an @ sign"); } else {document.signupEmails.submit();} }