javascript - SCRIPT5009: 'Page_ClientValidate' is undefined -


i getting error when run code in internet explore 11. works fine when run on ff , chrome. checked ie 8 on windows server 2003 server , works.

error script5009: 'page_clientvalidate' undefined

javascript code:

function systemvalidation() {    if (page_clientvalidate()) { .. } }

any ideas why failing?

update

i tried code below , still doesnt work. annoying..

        function validatethis() {         if (typeof (page_clientvalidate) === 'function') {             var ispagevalid = page_clientvalidate('');             if (ispagevalid) {                 alert("page valid");                 return true;             }         }         alert("page not valid");         return false;     }

are there other alternatives same task?

one more thing, can prevent runtime errors updating code bit:

typeof(page_clientvalidate) === "function"

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