Question

when you enter text into the status box and click on any hyperlink or click on the back button, a dialog window will display the following message “Are you sure you want to leave this page?”?

Does is this done? how do you do it?

Answer 1

You need to set a dirty flag

<script type="text/javascript">

var isDirty=false;
window.onbeforeunload =function() {
 if (isDirty) return "Form not saved";
}

window.onload=function() {
  document.getElementById("someFieldId").onblur=function() {
    isDirty=this.value.length>0;
  }
}
</script>


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