/* all A tags whose HREF attribute ends in .pdf */
a[href$='.pdf'] { 
	padding-right: 18px;
	background: transparent url(/images/icon_pdf.gif) no-repeat center right;
}

/* all A tags whose REL attribute equals pdf */
a[rel='pdf'] { 
	padding-right: 18px;
	background: transparent url(/images/icon_pdf.gif) no-repeat center right;
}

/*  all A tags whose REL attributes has the letters pdf somewhere mixed in*/
a[rel*='pdf'] { 
	padding-right: 18px;
	background: transparent url(/images/icon_pdf.gif) no-repeat center right;
}

/* all A tags whose REL attribute contains the value pdf, seperated from other values with a space */
a[rel~='pdf'] { 
	padding-right: 18px;
	background: transparent url(/images/icon_pdf.gif) no-repeat center right;
}
a[href$='.doc'] { 
	padding-right: 18px;
	background: transparent url(/images/icon_doc.gif) no-repeat center right;
}
a[href$='.docx'] { 
	padding-right: 18px;
	background: transparent url(/images/icon_doc.gif) no-repeat center right;
}
a[href$='.xls'] { 
	padding-right: 18px;
	background: transparent url(/images/icon_xls.gif) no-repeat center right;
}
a[href$='.ppt'] { 
	padding-right: 18px;
	background: transparent url(/images/icon_ppt.gif) no-repeat center right;
}

/* all A tags whose HREF attribute starts with mailto: */
a[href ^="mailto:"] {
	padding-right: 18px;
    background: transparent url(/images/icon_mailto.gif) no-repeat center right;
}

a[rel ~='external'] {
	padding-right: 18px;
	background: transparent url(/images/icon_external.gif) no-repeat center right;
}