asp.net - test if page is valid before running javascript -


i have javascript "freezes" screen when submit button pressed. stop double clickers.

i have discovered there issue if validator control returns false, in that, screen has "frozen", user can't fix problem input data.

i need able tell if page valid or not, if not, can un-freeze screen.

how can this??

javascript code freezes screen... (originally 4guysfromrolla)

function freezescreen(msg) { var outerpane = document.getelementbyid('freezepane'); var innerpane = document.getelementbyid('innerfreezepane'); if (outerpane) outerpane.classname = 'freezepaneon'; }

code runs javascript...

<asp:button id="btnsubmit" runat="server" text="<%$ resources:localizedtext, button_submitorder %>" onclick="btnsubmit_click" validationgroup="validateheader" onclientclick="freezescreen();" />

it this. 

function validatepage() {     freezescreen();      if (typeof (page_clientvalidate) == 'function') {         page_clientvalidate();     }      if (page_isvalid) {         unfreezescreen();         return true;     }     else {         unfreezescreen();         return false;     } }

and on button

<asp:button id="btnsubmit" runat="server" text="<%$ resources:localizedtext, button_submitorder %>" onclick="btnsubmit_click" validationgroup="validateheader" onclientclick="return validatepage();" />

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