Suppress F5 Key
Jul 23, 2005
I'm working on an app where the refreshing of the window by pressing the
F5 key needs to be suppressed. I thought it would be straightforward but
I can't get it to work. This is the code I'm currently trying:
okdh = function(e) {
if (e.which == 116) e.preventDefault();
}
document.addEventListener("keydown", okdh, false);
e.which returns a number
e.which returns 116 when the F5 key is pressed
e.cancelable is true when the F5 key is pressed
Is the default action of the F5 key something that can be suppressed?
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Oct 14, 2006
I need to suppress the function keys (F1, F2, F3 ecc.) to use these keys to do other operations within the web pages of my application.
I wrote this code:
document.onkeydown=function(evt) {
if (evt==undefined) evt="";
var keycode = (window.event)?window.event.keyCode:evt.keyCode;
alert("onkeydown: "+keycode);
return false;
};
It works fine with Firefox but IE seems to ignore the "return false" and I'm not able to byepass this problem. How can I do?
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Jul 23, 2005
window.onerror is used to catch and supress the script error. but it
will catch the error only when the script is within the same source
file.
for example, consider a html file MainFrame.htm as ....
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Jul 19, 2006
Is it possible to disable/suppress alert popups in javascript? I need
to write a function that will loop through a form's inputs and
"manually" fire their onchange events (if found). Some of those
functions could popup alert boxes which I'd like to be able to
temporarily suppress.
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Jul 20, 2005
How can I identify the Table that the Geocities banner is in?
I tried
document.all.tags("table")[0].style.display = 'none'
no matter what number I used nothing worked.
Using CSS script
TABLE {display:none}
This works, but then I have to go to each table seperately and set the
display to block.
I would like to be able to directly identify the table the banner is
in, so I can disable only the 1 table.
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Dec 10, 2009
Using Javascript, ASP.net with C# code behind. I am validating a textbox using the onblur event. It is being validated in that it must have an alphanumeric entry before the user tabs off of it to the next box. The validation part works, the part that doesn't work is that I get the validation alert textbox if I close the window. I have a workaround in that I am assigning that textbox a character using windo.onberforeunload but I know that isn't right.
Here is what I have so far...
Code behind on Page_Load...
txtCLBRTNWC.Attributes.Add("onblur", "return reqVLD(this)");
Here is my textbox field...
<asp:TextBox ID="txtCLBRTNWC" runat="server" Width="75" MaxLength="4"
ontextchanged="txtCLBRTNWC_TextChanged" TabIndex="1"
onkeyup="clbwclngCHK(this);" ></asp:TextBox>
And here are the 2 functions being used...
function reqVLD(alphanumericChar){
var chk = /^[a-zA-Z0-9]+$/;
// var boxid = document.getElementById("<%=txtCLBRTNWC.ClientID%>").value;
// var matchArray = boxid.match(chk);
if(document.getElementById("<%=txtCLBRTNWC.ClientID%>").value.match(chk)){
return true;
} else {
document.getElementById("<%=txtCLBRTNWC.ClientID%>").focus();
document.getElementById("<%=txtCLBRTNWC.ClientID%>").value = "";
alert("Please enter a Work Center.");
return false;
}}
function clbwclngCHK(obj_in)//When txtCLBRTNWC entry hits the max of 4 auto focuses to next box. {
if (obj_in.value.length == 4) document.getElementById("<%=txtSTRTDT.ClientID%>").focus();
}
Here is my work around...
window.onbeforeunload = function (){
document.getElementById("<%=txtCLBRTNWC.ClientID%>").value = "1";
}
User has to enter something in box before they can move on. This is checked and validating using an onblur event. Problem is, the onblur event fires if closingexiting the window.
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