2. Define a function to get the style sheet object
var styleSheetTitle = "headstyle"; function getStyleSheetByTitle (styleSheetTitle) { var i = 0; while ( ( i < document.styleSheets.length ) && (document.styleSheets.item(i).title != styleSheetTitle) ) { i++; } if (i == document.styleSheets.length) return null; else return document.styleSheets.item(i); }