var gDebug = false; function RunDebugger( aCalledFrom ) { gDebug = true; var oldBodyOnload = window.onload; window.onload = function() { oldBodyOnload(); if(!getElement(DEBUG_WINDOW_ELEMENT_ID)) { debugWindow = document.createElement("textarea"); debugWindow.id = DEBUG_WINDOW_ELEMENT_ID; debugWindow.style["width"] = "100%"; debugWindow.style["height"] = "500px"; debugWindow.innerHTML = "---- I AM THE JAVASCRIPT DEBUG WINDOW ----\n\nI was called via RunDebugger() in " + aCalledFrom + ". Comment me out to get rid of me!\n\nTo use me simply...\n\n1) Call RunDebugger('the_file_you_called_me_from'); in your JavaScript anywhere after the tag.\n\n2) Add if(gDebug){ getElement(DEBUG_WINDOW_ELEMENT_ID).innerHTML += 'What you want to display!'; } Anywhere you want to output to the debug window.\n\nSimple, isn't it?\n\n"; document.body.appendChild(debugWindow); } else { getElement(DEBUG_WINDOW_ELEMENT_ID).innerHTML += "\n\nPlease don't call me more then once. I only need to be called once. It appears " + aCalledFrom + " is also trying to call me.\n\n"; } } }