function validateForm(theform){for(var i=0;i<theform.elements.length;i++){var element=theform.elements[i];if(element.className.indexOf("required")!=-1){element.className="required";if(!isFilled(element)){alert("Please enter your "+element.id);element.className+=" error";element.focus();return false;}}if(element.className.indexOf("email")!=-1){element.className="required";if(!isEmail(element)){alert("Please check you have entered a valid email address");element.className+=" error";element.focus();return false;}}}return true;}function isFilled(field){if(field.value.length<1){return false;}else{return true;}}function isEmail(field){if(field.value.indexOf("@")==-1||field.value.indexOf(".")==-1){return false;}else{return true;}}