javascript - Clienside validation before server side -


My problems:

1) Postback is always

2) What This is

The user clicks the visible click button.

It says that is invalid ().

If the page is valid then invoke the server side function.

If the page is invalid, then the warning. 

  & lt; Asp: button id = "btnSubmit" runat = "server" text = "send" tooltip = "send" CausesValidation = "true" CssClass = "blueNew buttonNew" OnClientClick = "if (); return false;" / & gt; & Lt; Div style = "display: none;" & Gt; & Lt; ASP: Button ID = Submit "hidden button" "runat =" server "OnClick =" btnSubmit_Click "/>  & lt; script> function isalid () {if (Page_IsValid ) {Var button = document.getElementByID ("& lt;% = hiddenBtnSubmit.ClientID%>"); button.click ();} Else {if (! ReqFirstName.IsValid) {Warning ("The first name is invalid" );}}}     
 
 
 No, you just To add validator like this:  
  & asp: text box runat = "server" id = "txtEmail" /> & lt; asp: RequiredFieldValidator ErrorMessage = "Email Required" tooltip = "Email" ASP: Validation Correction Runat = "Server" DisplayMode = "BulletList" ShowMessageBox = "true" /> 
 / Code>  
 And whenever you try to submit your form verification will be performed on the customer, you do not have to manually perform the verification  
 output Something like this:  
 Enter image details here  
 1 Edit  
  & lt; Script type = "text / javascript" & gt; Validate the function () {var val = Page_ClientValidate (''); If {for (Val!) (I = 0; I & lt; Page_Validators.length; i ++) (! Page_Validators [i] .isvalid) {if {$ ("#" + Page_Validators [i] .controltovalidate) .qtip (); }}} Return Values; } & Lt; / Script & gt; & Lt; Asp: Button OnClientClick = "Validate return ();" Text = "post" run = "server" />

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