function getIE4StyleObject(id) { return document.all[id].style; }

function getNS4StyleObject(id) { return document.layers[id]; }

function getW3CStyleObject(id) { return document.getElementById(id).style; }

var getStyleObject = null;

if (document.getElementById)

	getStyleObject = getW3CStyleObject;

else if (document.all)

	getStyleObject = getIE4StyleObject;

else 

	getStyleObject = getNS4StyleObject;