JavaScript Alerts

/* Copyright 2004 Six Apart. This code cannot be redistributed without permission from www.sixapart.com. $Id: alert.js 2 2006-06-09 23:16:03Z hachi $ */ /* -------------------------------------------------------------------------------- TC.Alert overrides JavaScript's built-in alert() method, putting the results in a newly spawned console window -------------------------------------------------------------------------------- */ /* constructor */ TC.Alert = function() { this.createWindow(); this.count = this.prev ? this.prev.count : 0; } /* config */ TC.Alert.width = 640; TC.Alert.height = 420; TC.Alert.windowName = "alert"; /* static variables */ TC.Alert.instance = null; /* static methods */ TC.Alert.alert = TC.alert = function( msg ) { if( !TC.Alert.instance ) TC.Alert.instance = new TC.Alert(); if( TC.Alert.instance ) return TC.Alert.instance.alert( msg ); return true; } /* instance methods */ TC.Alert.prototype.alert = function( msg ) { // create window this.createWindow(); // check for no window if( !this.window ) { confirm( "Alert popup window blocked. Using confirm() instead.\n\n" + msg ); return true; } // create div var div = this.window.document.createElement( "div" ); div.style.backgroundColor = (this.count % 2) ? "#eee" : "#fff"; div.style.width = "auto"; div.style.padding = "8px"; div.innerHTML = msg; // append to window this.window.document.body.appendChild( div ); // scroll window to bottom this.window.scroll( 0, this.window.document.body.scrollHeight ); // increment msg count this.count++; // end return true; } TC.Alert.prototype.createWindow = function() { if( this.window && this.window.document ) return; // create window var x = "auto"; var y = "auto"; var attr = "resizable=yes, menubar=no, location=no, directories=no, scrollbars=yes, status=no, " + "width=" + TC.Alert.width + ", height=" + TC.Alert.height + "screenX=" + x + ", screenY=" + y + ", " + "left=" + x + ", top=" + y + ", "; this.window = window.open( "", this.windowName, attr ); // check for blocked popup if( !this.window ) return; // write body this.window.document.write( "JavaScript Alerts" ); // setup style this.window.title = "JavaScript Alerts"; this.window.document.body.style.margin = "0"; this.window.document.body.style.padding = "0"; this.window.document.body.style.fontFamily = "verdana, 'lucida grande', geneva, arial, helvetica, sans-serif"; this.window.document.body.style.fontSize = "10px"; // get previous instance and attach new instance this.prev = this.window.tcai; this.window.tcai = this; // dereference previous previous if( this.prev ) this.prev.prev = null; } /* overrides */ window.alert = TC.Alert.alert; // msie alert = TC.Alert.alert; // moz