/*



tip_followscroll.js	v. 1.11







The latest version is available at



http://www.walterzorn.com



or http://www.devira.com



or http://www.walterzorn.de







Initial author: Walter Zorn



Last modified: 3.6.2008







Extension for the tooltip library wz_tooltip.js.



Lets a "sticky" tooltip keep its position inside the clientarea if the window



is scrolled.



*/







// Make sure that the core file wz_tooltip.js is included first



if(typeof config == "undefined")



	alert("Error:\nThe core tooltip script file 'wz_tooltip.js' must be included first, before the plugin files!");







// Here we define new global configuration variable(s) (as members of the



// predefined "config." class).



// From each of these config variables, wz_tooltip.js will automatically derive



// a command which can be passed to Tip() or TagToTip() in order to customize



// tooltips individually. These command names are just the config variable



// name(s) translated to uppercase,



// e.g. from config. FollowScroll a command FOLLOWSCROLL will automatically be



// created.







//===================	GLOBAL TOOLTIP CONFIGURATION	======================//



config. FollowScroll = false		// true or false - set to true if you want this to be the default behaviour



//=======	END OF TOOLTIP CONFIG, DO NOT CHANGE ANYTHING BELOW	==============//











// Create a new tt_Extension object (make sure that the name of that object,



// here fscrl, is unique amongst the extensions available for



// wz_tooltips.js):



var fscrl = new tt_Extension();







// Implement extension eventhandlers on which our extension should react



fscrl.OnShow = function()



{



	if(tt_aV[FOLLOWSCROLL])



	{



		// Permit FOLLOWSCROLL only if the tooltip is sticky



		if(tt_aV[STICKY])



		{



			var x = tt_x - tt_GetScrollX(), y = tt_y - tt_GetScrollY();







			if(tt_ie)



			{



				fscrl.MoveOnScrl.offX = x;



				fscrl.MoveOnScrl.offY = y;



				fscrl.AddRemEvtFncs(tt_AddEvtFnc);



			}



			else



			{



				tt_SetTipPos(x, y);



				tt_aElt[0].style.position = "fixed";



			}



			return true;



		}



		tt_aV[FOLLOWSCROLL] = false;



	}



	return false;



};



fscrl.OnHide = function()



{



	if(tt_aV[FOLLOWSCROLL])



	{



		if(tt_ie)



			fscrl.AddRemEvtFncs(tt_RemEvtFnc);



		else



			tt_aElt[0].style.position = "absolute";



	}



};



// Helper functions (encapsulate in the class to avoid conflicts with other



// extensions)



fscrl.MoveOnScrl = function()



{



	tt_SetTipPos(fscrl.MoveOnScrl.offX + tt_GetScrollX(), fscrl.MoveOnScrl.offY + tt_GetScrollY());



};



fscrl.AddRemEvtFncs = function(PAddRem)



{



	PAddRem(window, "resize", fscrl.MoveOnScrl);



	PAddRem(window, "scroll", fscrl.MoveOnScrl);



};