function checkage(){var min_age=17;var age=document.forms["age_form"]["ani"].value;if(IsNumeric(age)!=false){if(age<min_age){$("#clipno").show("slow");$("#valid").hide("slow")}else{$("#clip").show("slow");$("#valid").hide("slow")}}else{document.getElementById('string').style.display='block'}return false}function IsNumeric(input){return(input-0)==input&&input.length>0}